If a randomly selected purchaser has an extended warranty the probability that he or she has a basic model is 0.3940.
By employing the criteria that certain events have occurred, the Bayes Theorem allows us to determine the posterior probability.
Given that,
E: Purchaser has extended Warranty.
A: He chooses a basic model.
B: He chooses a deluxe model.
P(A) = 0.42
P(B) = 0.58
P(E/A) = 0.44
P(E/B) = 0.49
The probability that a randomly selected customer has an extended warranty is given by:
P(E)= P(E/A)*P(A)+P(E/B)*P(B) = 0.44*0.42 + 0.49*0.58= 0.469
If a randomly selected purchaser has an extended warranty the probability that he or she has a basic model is given by:
P(A/E)= P(E/A)*P(A)/P(E) = 0.44*0.42/0.469 = 0.3940
Thus, If a randomly selected purchaser has an extended warranty the probability that he or she has a basic model is 0.3940.
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The distance, d, in miles that a person can see to the horizon can be modeled by the formula d = radical 3h/2 where h is the person's height above sea level in feet. How far to the horizon can a person see if they are 1,000 feet above sea level?
Answer: To find the distance a person can see to the horizon when they are 1,000 feet above sea level, we can substitute h = 1000 into the formula d = radical 3h/2
d = radical 3(1000)/2 = radical 3(1000*2) = radical 6000
d = radical 6000 = 77.46 miles
So if a person is 1,000 feet above sea level, they can see 77.46 miles to the
Step-by-step explanation:
At a community barbecue, Mrs. Vance and Mr. Coleman are buying dinner for their families. Mrs. Vance purchases 1 hot dog meal and 3 hamburger meals, paying a total of $36. Mr. Coleman buys 2 hot dog meals and 2 hamburger meals, spending $32 in all. How much do the meals cost?
The cost of one hamburger meal is $10 and the cost of one hot dog meal is $6.
What is the cost of one meal?The first step is to form a system of equations using the information in the question:
a + 3b = 36 equation 1
2a + 2b = 32 equation 2
Where:
a = cost of one hot dog meal
b = cost of one hamburger meal
The elimination method would be used to determine the cost of each meal
Multiply equation1 by 2
2a + 6b = 72 equation 3
Subtract equation 2 from equation 3
4b = 40
Divide both sides of the equation by 4
b = 40 / 4
b = 10
Substitute for b in equation 1:
a + 3(10) = 36
a + 30 = 36
a = 36 - 30
a = 6
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The velocity of a drone, during the first minute of flying, is recorded in the table below. Time (seconds) 0 10 20 30 40 50 60 Velocity (ft./sec) 20 22 26 30 36 34 32Using the left-hand rectangular approximation method (LRAM), what is the approximate total distance the drone flies during the first minutea. 1.480 ftb. 1.680 ftc. 1.800 ftd. 4.780 ft
Answer: 1680 ft
Step-by-step explanation:
See attachment
There are four typical measures of the central tendency of a frequency distribution. Which of the following is NOT ameasure of central tendency?a. meanb. medianC moded. method of least squares
method of least squares is not a measure of central tendency which is not involved in the typical measures.
The central tendency of the dataset are defined as three important measures namely mean, median and mode. The mean shows the average value of the dataset. which can be calculated as the sum of all the values in the dataset which are divided by the number of values. and it is considered as the arithmetic mean. Some of the other measures of mean which is used to find the central tendency are as mentioned as:
Geometric Mean , Harmonic Mean ,Weighted Mean.
Median is the middle value of the dataset in which the it is arranged in the ascending order or in descending order. When the dataset which contains an even number of values, then the median value of the dataset can be calculated by taking the mean of the middle two values.
The mode shows the frequently occurring value in the dataset. Sometimes the dataset are arranged and which contain multiple modes and in some situations , it does not contain any mode at all.
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The population of a large city can be calculated using the function P = 227,000(.98)^t . What can you say about the rate of change from year 1 to year 2 compared to the rate of change from year 9 to year 10?
The rate of change will be greater from year 1 to year 2.
The rate of change will be the same for all years.
The rate of change will be greater from year 9 to year 10.
There is not enough information given.
Answer:
The rate of change from year 1 to year 2 is - 2%.
The rate of change from year 9 to year 10 is -0.02%
The rate of change will be the same for all years.
Step-by-step explanation:
While this seems an unlikely answer (why would the rate reamin the same every year?), it is the correct answer since we are told that one equation is valid for t years. With no other information, we must conclude the rate of change remains the same every year. The actual number by which the population shrinks is changing, but the rate remains the same.
The function P(t) = 227,000(.98)^t says that the initial population in year 0 is 227,000 [227,000(0.98)^0 = 227,000]. The factor (0.98) is the result of the expression (1-(0.02)^t). The 1 is the factor for the initial population and the -0.02 is the fraction of 1 by which the population declines each year (2%).
Initial population = 227,000 [227,000(0.98)^0 = 227,000
Year 1 population would be (227,000)*(1-0.02)^1 or (227,000)*(0.98)
Year 2 population would be (227,000)*(1-0.02)^2 or (227,000)*(0.98)^2
Year 9 population would be (227,000)*(1-0.02)^9 or (227,000)*(0.98)^9
Year 10 population would be (227,000)*(1-0.02)^10 or (227,000)*(0.98)^10
The change is the same every year (0.98).
The formula for the lateral area of a right cone is LA = rs, where r is the radius of the base and s is the slant height of the cone. Which are equivalent equations?
The formula of lateral area of a cone can be equivalent to the formulas:
LA = r√(r^2 + h^2) and
LA = πrl
The formula for the lateral area of a right cone is LA = rs, where r is the radius of the base and s is the slant height of the cone.
The slant height (s) of a cone is the distance from the apex of the cone to the center of the base along a line that is perpendicular to the base and passes through the apex. The slant height of a cone can be found using the Pythagorean theorem using the radius (r) and the height (h) of the cone:
s = √(r^2 + h^2)
So, the formula for lateral area of a cone can be equivalent to the formula:
LA = r√(r^2 + h^2)
Another equation that is equivalent to the lateral area formula is
LA = (1/2)(2πr)(l)
LA = πrl
where l is the slant height of the cone.
This is because the lateral area of a cone is equal to (1/2) of the circumference of the base multiplied by the slant height, and we know that the circumference of a circle is equal to 2πr.
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the rate of interest for 5 years is 2.5 and the interest is 2400. what is the total amount deposited?
The total amount deposited is $300.
What is Percentage?percentage, a relative value indicating hundredth parts of any quantity.
Given that rate of interest for 5 years is 2.5 and the interest is 2400
We have to find the total amount deposited.
Simple interest=PNR/100
Principal P=2400Rs
Rate =2.5 per annum
N=time in year=5
Now plu in the value in the formula.
simple Interest=2400×2.5×5/100
=300
Hence, 300 is the amount which is deposited.
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What topics are introduced in Algebra 2?
Answer:
Algebra 2 typically builds on the concepts covered in Algebra 1 and introduces more advanced topics such as:
Quadratic equations and functions
Complex numbers
Polynomial functions and their operations
Rational functions and their operations
Conic sections
Exponential and logarithmic functions
Sequences and series
Trigonometry
Matrices and determinants
Permutations and combinations
Probability
Functions and relations
Limits and derivatives
Answer:
rrtgf thing for them code mine took also
3
Step-by-step explanation:
tutfd
In a triangle, the measure of the first angle is six times a number. The measure of the second angle is nine less than the first angle. The measure of the third angle is three times the number more than the measure of the first angle. Which equation best represents this description of the triangle
The equation 10x + 9 = 180 can be used to represent the description of the triangle, and solving for x gives x = 17.1.
x + 6x + 3x + 9 = 180
10x + 9 = 180
10x = 171
x = 17.1
The measure of the first angle is represented by x, and the measure of the second angle is represented by 6x - 9. The measure of the third angle is represented by 3x + 9. We can add these three equations together to get the equation 10x + 9 = 180. We can then solve for x by subtracting 9 from both sides of the equation to get 10x = 171. Finally, we can divide both sides of the equation by 10 to get x = 17.1.
The equation 10x + 9 = 180 can be used to represent the description of the triangle, and solving for x gives x = 17.1.
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a standard interior staircase has steps each with a rise (height) of 22 cm and a run (horizontal depth) of 23 cm. research suggests that the stairs would be safer for descent if the run were, instead, 28 cm. for a particular staircase of total height 4.57 m, how much farther into the room would the staircase extend if this change in run were made?
The staircase would extend 104.3cm farther into the room if the run were made 28cm instead of 23cm.
To find out how much farther into the room the staircase would extend if the run were 28 cm instead of 23 cm, we need to calculate the difference in the run and then multiply it by the number of steps.
The difference in the run is 28cm - 23cm = 5cm
To find the number of steps, we need to divide the total height of the staircase by the height of each step:
4.57m / 0.22m = 20.86 steps.
So the difference in the run multiplied by the number of steps is:
5cm * 20.86 steps = 104.3cm.
Therefore, the staircase would extend 104.3cm farther into the room if the run were made 28cm instead of 23cm.
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[tex]\frac{x+5}{x+9}+\frac{x+7}{x^{2}-9}÷\frac{x^{2}-9}{x+3}[/tex]
The result for the division of the fractions in this problem is given as follows:
[tex]\frac{x^3 + 6x^2 + 7x + 18}{(x - 3)(x + 9)(x^2 - 9)}[/tex]
How to divide two fractions?The division of two fractions is given by the multiplication of the first fraction by the inverse of the second fraction.
The first fraction in this problem is composed by the sum of two fractions, as follows:
[tex]\frac{x + 5}{x + 9} + \frac{x + 7}{x^2 - 9}[/tex]
Applying the subtraction of perfect squares, we have that:
x² - 9 = (x - 3)(x + 3).
The second fraction is given as follows:
(x² - 9)/(x + 3).
Considering the factoring of x² - 9, the second fraction is given as follows:
x - 3.
Hence the inverse is of:
1/(x - 3).
Then the entire quotient is given as follows:
[tex]\left(\frac{x + 5}{x + 9} + \frac{x + 7}{x^2 - 9}\right) \times \frac{1}{x - 3}[/tex]
The addition of the two fractions is given as follows:
[tex]\frac{(x + 5)(x^2 - 9) + (x + 7)(x + 9)}{(x + 9)(x^2 - 9)} = \frac{x^3 + 6x^2 + 7x + 18}{(x + 9)(x^2 - 9)}[/tex]
Applying the multiplication by x - 3 in the denominator, the quotient is given as follows:
[tex]\frac{x^3 + 6x^2 + 7x + 18}{(x - 3)(x + 9)(x^2 - 9)}[/tex]
Missing InformationThe problem asks for the quotient between the two fractions.
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evaluate the double integral. 7xy2 da, d is enclosed by x = 0 and x = 4 − y2 d
The value of the double integral of the expression is 2/15.
The term integral in math is defined as a method of adding or summing up the parts to find the whole and it is basically used to find the volume, area and the central values of many things.
Here we have given the expression that can be written as
=> [tex]\int_{1}^{-1}\int_{0}^{\sqrt{1-y^{2}}}xy^2dxdy[/tex]
When we integrate the equation, then we get the simplified form as follows:
=>[tex]\int_{1}^{-1}\mathrm{[\frac{x^2y^2}{2}]}_{0}^{\sqrt{1-y^2}}[/tex]
Here we have to apply the values on the expression then we get the resulting expression as,
=>[tex]\frac{1}{2}\int_{1}^{-1}(y^2-y^4)dy[/tex]
Now, we have to Integrate with respect to y, then we get the expression as follows:
=>[tex]\frac{1}{2}\mathrm{[\frac{y^3}{2} - \frac{y^5}{5}]}_{-1}^{1}[/tex]
Then the resulting value of double integral is written as,
=> 2/15
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Indicate if each equation in the table has no solutions, one solution, or
infinitely many solutions.
- 2(x - 2) = 4 - 2x
A
B
C
A. No Solution
B. One Solution
C.
Infinitely many
solutions
The linear equation -2(x - 2) = 4 - 2x has infinitely many solutions
What is a Linear EquationA linear equation is a mathematical statement that describes a relationship between two or more variables and is written in the form of ax + by = c, where a, b and c are constants and x and y are variables. The equation is called "linear" because it is a first degree equation and it describes a straight line when graphed on a coordinate plane.
In this problem, we have to solve for the value of x
-2(x - 2) = 4 - 2x
Open the bracket
-2x + 4 = 4 - 2x
collect like terms
-2x + 2x = 4 - 4
0 = 0
This has an infinitely many solution
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13. The cost of 7 shirts and 3 pairs of trousers is shs. 2950 while that of 5 pairs of trousers and 3 shirts is less by 200. How much will Dan pay for 2 shirts and 2 pairs of trousers? 14 A father is twice as old as his
Dan paid for 2 shirts and 2 pairs of trousers will be shs 1300.
What is the solution to the equation?The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.
The cost of 7 shirts and 3 pairs of trousers is 2950 while that of 5 pairs of trousers and 3 shirts is less by 200.
Let 'x' and 'y' be the cost of a shirt and trousers, respectively. Then the equations are given as,
7x + 3y = 2950 ....1
5y + 3x = 2950 - 200
3x + 5y = 2750 ....2
Multiply equation 1 by 5 and equation 2 by 3, then we have
35x + 15y = 14750 ...3
9x + 15y = 8250 ...4
Subtract equation 4 from equation 3, then we have
35x - 9x = 14750 - 8250
26x = 6500
x = 250
Then the value of 'y' is given as,
3(250) + 5y = 2750
750 + 5y = 2750
5y = 2000
y = 400
Then Dan pay for 2 shirts and 2 pairs of trousers will be given as,
⇒ 2 x 250 + 2 x 400
⇒ 500 + 800
⇒ 1300
Dan paid for 2 shirts and 2 pairs of trousers will be shs 1300.
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we roll a fair 6-sided die 5 times. what is the probability that exactly 3 of the 5 rolls are either a 1 or a 2?
Therefore , the solution of the given problem of probability comes out to be the result of adding these five times is: 5 x (1/32) = 5/32.
What does probability mean as a process?Probability theory is a branch of mathematics that deals with estimating the likelihood of an event occurring or of a claim being true. A probability is just a value between 0 and 1 and 1, with 0 approximately denoting the possibility of an event occurring and 1 denoting certainty. The likelihood or chance that an event will occur is expression numerically as a probability.
Here,
There are five options since you need one additional set and four even numbers:
5 C 4 ==5
OEEEE, EOEEE, EOEOE, EEEOE, and EEEEO
Three-sixths of the time, you'll obtain an odd number.
Three-sixths of the time, you'll obtain an even number.
As a result, the likelihood of OEEEE is (3/6)5=1/32.
This also represents the likelihood of each additional possibility.
The result of adding these five times is: 5 x (1/32) = 5/32.
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A person invests 4000 dollars in a bank. The bank pays 5.25% interest compounded monthly. To the nearest tenth of a year, how long must the person leave the money in the bank until it reaches 5100 dollars?
The person must leave the money for 4 years and 8 months in the bank until it reaches 5100 dollars.
What is compound interest rate?Compound interest is computed as interest on the principle of an account plus any accrued interest.
Compound interest can be calculated using the following formula:
x = P (1+r/n[tex])^{nt}[/tex]
,where x = compound interest
P = principal (the initial deposit or loan amount)
r = annual interest rate
n = the number of compounding periods per unit of time
t = the number of time units the money is invested or borrowed for
Given:
A person invests 4000 dollars in a bank.
The bank pays 5.25% interest compounded monthly.
First, convert R as a percent to r as a decimal
r = R/100
r = 5.25/100
r = 0.0525 per year,
Then, solve the equation for t,
t = ln(A/P) / n[ln(1 + r/n)]
t = ln(5,100.00/4,000.00) / (12 × [ln(1 + 0.0525/12)])
t = ln(5,100.00/4,000.00) / (12 × [ln(1 + 0.004375)])
t = 4.638 years
t = 4 years and 8 months.
Therefore, the time is 4 years and 8 months.
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The temperature is 8 degrees Fahrenheit. It is expected to fall 5 degrees each hour for the next several hours. Write and solve and equation to find how many hours will it take for the temperature to reach negative 7 degrees fahrenheit?
Answer:
8-5x=-7 , answer is 3hours
Step-by-step explanation:
Start with the current temperature 8 degrees
Then use x to represent the hours of the temperature dropping x
Then set it equal to the temperature you want to reach -7
So 8-5x=-7
To solve get the x alone so subtract 8 form both sides
-5x=-15
And then solve
X=3
The area of a rectangle is 2 square feet: The perimeter of the rectangle is 9 ft. Find the length, /, and width, W, of the rectangle. What is /2 + w2 ?
The length and breadth of a rectangle with an area of 2 square feet and a perimeter of 9 feet are 4 feet and 0.5 feet, respectively.
What is area?The size of a region on a surface is measured in area. Surface area refers to the area of an open surface or the border of a three-dimensional object, whereas area of a plane region or plane area refers to the area of a form or planar lamina. The total space occupied by a flat (2-D) surface or the form of an item is defined as its area. Draw a square on a sheet of paper using a pencil. It is a two-dimensional figure. The area of the form on the paper is referred to as its Area. Consider your square to be made up of smaller unit squares.
Here,
area=2
perimeter=9
lw=2
w=2/l
2l+2w=9
2l+2*(2/l)=9
2l+4/l=9
2l²+4=9l
2l²-9l+4=0
2l²-8l-1l+4=0
2l(l-4)-1(l-4)=0
(2l-1)(l-4)=0
l=1/2, 4
l=4 feet
w=2/l
w=2/4
w=0.5 feet
l²+w²=4²+(0.5)²
=16.25
The length and width of rectangle whose area is 2 square feet and perimeter as 9 feet is 4 feet and 0.5 feet.
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Factorise 6-y^2
Please help
Answer:
6-y^2 can be factored by using the difference of squares formula which states that:
a^2 - b^2 = (a+b)(a-b)
We can factorize 6-y^2 by using the following:
6 - y^2 = (sqrt(6) + sqrt(-y^2))(sqrt(6) - sqrt(-y^2))
= (sqrt(6) + yi)(sqrt(6) - yi)
where i is the imaginary unit.
So, 6-y^2 = (sqrt(6) + yi)(sqrt(6) - yi) is the factored form of 6-y^2
Please note that the factorization is only true for real values of y, when y is not real the expression can't be factorized.
her budget is still $50 a month. to find out how many gigabytes of data she could use if she chose this plan, she writes c(x)
The function that represents the total cost for the number of gigabytes is; C(x) = 50x
How to express linear equation word problems?Some of the steps to writing a system of linear equations from word problems are;
1) Understand the problem like the words used in stating the problem and what exactly you are trying to find.
2) Translate the problem to an equation by assigning a variable (or variables) to represent the unknown.
3) Carry out the plan and solve the problem.
We are told that her budget is $50 a month. Therefore this is like the rate for each gigabyte and if the number of gigabytes is denoted as x, then the function of the total cost is;
C(x) = 50x
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5.jill is 9 kilometers away from joe. both begin to walk toward each other at the
same time. jill walks at 1.5 kilometers per hour. they meet in 2 hours. how fast is
joe walking?
Joe moves along at a speed of 2.5 km/h.
What is speed?Speed is what it means. the speed at which an object's location changes in any direction.
The distance traveled in relation to the time it took to travel that distance is how speed is defined.
Since speed simply has a direction and no magnitude, it is a scalar quantity.
So, calculate walking speed of Joe as follows:
Jill covers 9 kilometers in 3 hours while moving at a 3-kilometer-per-hour pace.
Joe covers 7.5 kilometers in 3 hours while walking at a speed of x miles per hour.
Applying the formula, D = R * T.
We can determine Joe's rate by replacing D, which is 7.5 kilometers, and T, which is 3 hours:
7.5 = R * 3
Both sides by 3: Divide
R = 2.5
Therefore, Joe moves along at a speed of 2.5 km/h.
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Correct question:
Jill is 16.5 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill is 16.5 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill is walking 3 kilometers per hour. They meet in 3 hours. How fast is Joe walking?
______ units of measure.
Meter, kilogram and time units of measure.
What is Metric System?Everything around us has a measurement value, from the amount of sugar you put in a cake to the size of a football field. Each thing is measured differently based on its length, weight, volume, or duration. With these measurements, the idea of "Metric System" is introduced.
The Metric system has 3 main units namely, meter to measure the length, kilogram to measure the mass, and seconds to measure time.
Therefore, meter, kilogram and time units of measure.
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Find the equation of the line.
Use exact numbers.
y=y=y, equals
x+x+x, plus
\small{1}1\small{2}2\small{3}3\small{4}4\small{5}5\small{6}6\small{7}7\small{8}8\small{9}9\small{\llap{-}2}-2\small{\llap{-}3}-3\small{\llap{-}4}-4\small{\llap{-}5}-5\small{\llap{-}6}-6\small{\llap{-}7}-7\small{\llap{-}8}-8\small{\llap{-}9}-9\small{1}1\small{2}2\small{3}3\small{4}4\small{5}5\small{6}6\small{7}7\small{8}8\small{9}9\small{\llap{-}2}-2\small{\llap{-}3}-3\small{\llap{-}4}-4\small{\llap{-}5}-5\small{\llap{-}6}-6\small{\llap{-}7}-7\small{\llap{-}8}-8\small{\llap{-}9}-9yyxx
On solving the provided question, we can say that Slope is 1/2, so equation is y=1/2x+0 or y=1/2x.v
What is equation?An equation is a mathematical formula that connects two assertions using the equal sign (=) to denote equivalence. In algebra, an equation is a mathematical statement that establishes the equivalence of two mathematical expressions. For instance, an equal sign separates the components 3x + 5 and 14 in the equation 3x + 5 = 14. A mathematical formula is used to explain the connection between two sentences on either side of a letter. Frequently, there is just one variable, which is also the symbol. for example, 2x - 4 = 2.
We can utilize the slope-intercept version of the equation. It is written as y=mx+b. B is the y-intercept, and m stands for the slope. The line intersects the y-axis at (0,0). the y-intercept is consequently 0.
the slope by equation, we have
m = y2 - y1 / x2 - x1
m = 2-1/4-2
m = 1/2
Slope is 1/2, so equation is y=1/2x+0 or y=1/2x.
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The correct question is
Find the equation of the line. Use exact numbers. y=y=y, equals x+x+x, plus 5
A rectangular plot of land is divided into 4 parcels
with integer dimensions (see the diagram, which is not to
scale). Parcels A and D are square plots with a combined
area of 898 ft.². Parcel B has an area of 351 ft.². How
wide is the rectangular plot of land?
A quadratic equation in algebra is any equation that can be written in standard form as where x stands for an unknown value, a, b, and c stand for known numbers, and where a 0. If x + 20 = 0, then x must be -20.
What is quadratic equation?A quadratic equation in algebra is any equation that can be written in standard form as where x stands for an unknown value, a, b, and c stand for known numbers, and where a 0. Length + breadth equals the area of a rectangle. The length is 8 feet greater than the breadth in this instance since we are aware that it is 8 feet longer than its width. We may therefore write the length as x+8 if the width is x.
We may now express length and width as x•(x+8). We get x2 + 8x after multiplying.
We know that the area is 240 square feet but also that it is equal to x2 + 8x. So, x2 + 8x = 240. To get the equation, take 240 away from both sides.
x2 + 8x - 240 = 0.
The equation must now be solved. This can be accomplished by factoring, by applying the quadratic formula, or by solving the square. By factoring, I will demonstrate:
The formula for factoring x2 + 8x - 240 is (x + __)(x + ). The integers must be multiplied by -240 and added to equal 8.
Following are some number pairs that add up to -240:
-4 and 60-24 and 10-12 and 20Because they both sum up to 8, the numbers -12 and 20 are the ones we seek. -12•20 = -240, and -12 + 20 = 8.
We can factor x2 + 8x - 240 as (x - 12)(x + 20) as a result. Set each component to 0 in order to solve.
If x - 12 = 0, then x must equal 12.
If x + 20 = 0, then x must be -20.
The answers to the problem are 12 and -20, but neither of them makes sense. The solution -20 does not work since a rectangle's width cannot be negative. The width being 12 is the only answer that makes sense in this situation.
Consider what kind of form "width" is when choosing the units for width. 'Width' is a line. You use basic units, not squared or cubed units, for lines. The width measurement is therefore in feet.
The complete question is.
A regular plot of land has an area of 240 square feet and is 8 feet longer than its width....
a) Write a quadratic equation in the form ax2 + bx + c = , whose solution gives the width of the rectangular plot of land.
The equation for the width is blank (Type an equation. Type your answer in standard form)
b) Solve the equation.
The solution(s) to the quadratic equation found in part a is/are x =
(Type an integer or a simplified fraction. Use a comma to separate answers as needed)
The width of the plot is blank (ft3, ft2, or ft?
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pls help due tomorrow!!!!
Answer:
Any real value.
Step-by-step explanation:
Ok, so I am just gonna simplify the question a little bit.
[tex]\frac{x-8+3}{5}[/tex] = (x - 5)/5 or x/5 - 1..
Wait a minute, the question doesn't make sense.
The question is true for any value of x as | x | > 0 and - | x | will be < 0 no matter what.
Find the first three terms of the sequence below. T n = n 2 − 2 n − 4
The first three terms of the sequence is -5,-4,-1.
What is sequence of the number?
The fundamental concepts in mathematics are series and sequence. A series is the total of all elements, but a sequence is an ordered group of elements in which repetitions of any kind are permitted. One of the typical examples of a series or a sequence is a mathematical progression.
Here the given sequence nth term formula is,
=> [tex]T_n=n^2-2n-4[/tex]
Now put n=1 into given formula then
=>[tex]T_1=1^2-2*1-4=1-2-4 =-5[/tex]
Now put n=2 into given formula then
=> [tex]T_2=2^2-2*2-4=4-4-4=-4[/tex]
Now put n=3 into given formula then
=> [tex]T_3=3^2-2*3-4=9-6-4=-1[/tex]
Hence the first three term of the sequence i -5,-4,-1.
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a pharmaceutical company wants to conduct a survey of individuals who have high cholesterol. the company has obtained a list from primary care physicians throughout the country of individuals who are known to have high cholesterol. design a sampling method to obtain the individuals in the sample. be sure to support the choice.
A good sampling method for this scenario would be a probability-based method called Simple Random Sampling.
In Simple Random Sampling, each individual from the population of individuals who have high cholesterol has an equal chance of being selected for the sample. This ensures that the sample is representative of the population and that each individual in the population has a known non-zero probability of being selected.
This method can be supported by the fact that it is easy to implement, and it does not require any prior knowledge of the population characteristics. It also ensures that the sample is unbiased and has a good chance of being representative of the population.
Additionally, Simple Random Sampling is also a cost-effective sampling method as it is less expensive and time-consuming than other sampling methods such as stratified random sampling or cluster sampling.
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A realtor wishes to enclose 600 of land in a rectangular plot and then divide it into two plots with a fence parallel to one of the sides. What are the dimensions of the rectangular plot that require the least amount of fencing
The dimensions of the rectangular plot that require the least amount of fencing is :
A(17.32, 17.32) = 600
P(17.32, 17.32) = 121.24
Now, According to the question:
Optimization using Derivatives:
Suppose the function F(x) has continuous first- and second-order derivatives, F′(x) and F″(x).
At a point x=c in the domain of F(x), the function:
has a relative minimum if F′(c)=0 (critical point) and F″(c)>0 (concave up); and,has a relative maximum if F′(c)=0 (critical point) and F″(c)<0 (concave down).600 [tex]u^2[/tex] of land to be enclosed by fence
Area inside plot should be maximized, amount of fence should be minimized
If we draw a quick sketch, we get something like this:
_____ _____
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The two rectangles could be different sizes but if one rectangle size maximizes area then it would make sense to use that some rectangle for both sides.
Let's put some variables into our picture so we can define our constraints.
y y
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x | x | x |
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Now we just need an equation to connect our unknowns (how much fence to use) to our constraint (it has to have an exact area of 600 u^2.
A = x × 2y = area = 600
P = 3x + 4y = perimeter = a minimum
First we solve the area equation for y:
y = [tex]\frac{600}{2x}[/tex] = [tex]\frac{300}{x}[/tex]
and then we substitute that result into our perimeter equation:
P = 3x + 4 (300/x)
P = 3x + 1200/x
Our perimeter equation is: P(x) = 3x + 1200/x OR P(x) = 3x +1200[tex]x^-^1[/tex]
We can find what value of x makes our perimeter as small as possible (a minimum) by graphing or by using Calculus.
In Calculus we know that maximums and minimums always occur when the derivative is zero. This is because the slope (rate of change) at these points in a graph are always flat or zero. Our derivative is
P'(x) = 3 - 1200[tex]x^-^2[/tex]
When set equal to zero, we can solve for x:
3 - 1200[tex]x^-^2[/tex]= 0
1 - 400[tex]x^-^2[/tex] = 0
1 = 400/[tex]x^{2}[/tex]
[tex]x^{2}[/tex] = 400
x = ± 20
Our fence length can't be a negative number so our answer must be 20u.
If our x length is 20, then our y length must be 300/x to ensure our area is 600 u^2.
The y length is 300/(20) = 15
Let's put all of our numbers into our picture to see if it make sense.
15 15
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20 | 20 | 20 |
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15 15
Sure enough our area is 600.
Here's what we have right now:
A(20, 15) = 600
P(20, 15) = 120
How about we try something a little bigger like 20.5 for x and 14.63 for y?
A(20.5, 14.63) = 600
P(20.5, 14.63) = 120.02
How about we try something a little smaller like 19.5 for x and 15.38 for y?
A(19.5, 15.38) = 600
P(19.5, 15.38) = 120.02
It looks like if we try to change x, even a little, to make it bigger or smaller the perimeter only gets bigger.
You might have guessed at the beginning that a square is the best shape to use to maximize area, so let's try that as well.
Each rectangle is 300[tex]u^2[/tex]. We want a square so each side would be √(300) = 17.32
17.32 17.32
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17.32 | 17.32 | 17.32 |
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17.32 17.32
A(17.32, 17.32) = 600
P(17.32, 17.32) = 121.24
Hence, The dimensions of the rectangular plot that require the least amount of fencing is :
A(17.32, 17.32) = 600
P(17.32, 17.32) = 121.24
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comment calcule t'on (4x+5)²−25=0
Answer:
x = 0 and
x = -(5/2)
Step-by-step explanation:
(4x+5)²−25=0
(16x^2+40x + 25) - 25 = 0 [expand the square]
16x^2+40x = 0
8x(2x+5)=0
the roots are 8x=0 and 2x+5 = 0
x = 0 and x = -(5/2)
When solving a system of linear equations, try to algebraically form one equation that has only one variable. T/F
False. Solving a system of linear equations requires solving for multiple variables.
To solve for a single variable, you would only need to solve one equation.
To solve a system of linear equations, you need to use methods such as elimination, substitution, or graphing. For example, consider the system of equations:
3x + y = 7
2x - y = 4
To solve this system, you could use elimination by adding the equations together. This would give you the equation 5x = 11. To solve for x, you would then divide both sides by 5, giving you x = 11/5.
Once you have solved for x, you can substitute this value into either of the original equations to solve for y. In this example, substituting 11/5 for x into the first equation would give you 3(11/5) + y = 7. Simplifying this equation gives you y = -2/5.
Therefore, the solution to this system of linear equations is x = 11/5 and y = -2/5.
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