Jesse wants to factor the expression To find the x-intercepts.
Quadratic Expression:An expression containing a variable having the largest power of two is called a quadratic expression. The power of the expression should be two, not greater or lower.
Coefficients:A coefficient is a multiplication factor in a polynomial, series, or statement in mathematics; it is often a number.
Discriminant:The concept used to find the number of solutions of a quadratic equation is known as Discriminant. The expression that appears under the square root in the quadratic formula is named Discriminant.
X- intercept :The value of the x coordinate at the point where the graph intersects the x-axis, or alternatively, the value of the x coordinate at the point where the value of the y-coordinate equals zero, is the x-intercept for any curve.
Here we have
x² - x - 6 is factorized as (x - 3)(x + 2)
If we take (x - 3)(x + 2) = 0
=> (x - 3) = 0 (x + 2) = 0
=> x = 3 x = -2
This means x values are x-intercept
Therefore,
Jesse wants to factor the expression To find the x-intercepts.
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quota sampling occurs when available or accessible people or materials are selected, and the sample is weighted so that certain predetermined characteristics are represented. group of answer choices true false
Following the Sampling Theorem of statistics, the answer is True.
What are statistics?The study of statistics focuses on gathering, organizing, organizing, analyzing, interpreting, and presenting data.
What is Sampling Theorem?Each member of the group or community has an equal chance of being chosen when using probability sampling. According to probability-based statistical theory, this indicates that the sample is more likely to match the larger population, allowing for the drawing of more precise conclusions about the latter.
Yes, the quota sampling process occurs when the available or accessible people or material are selected. Due to large population size, Sampling process is preferred.
Since, Statistics convey characteristics of data to us. So yes, The sample is weighted so that predetermined characteristics are represented.
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An elevator can carry 25 adults or 30 children at one time. During the course of a day, the elevator carries a full passenger load 36 times. If all the passengers were children, how many more people would the elevator carry than if all the passengers were adults?
180 people would the elevator carry than if all the passengers were adults.
What is the meaning of times?
The mathematical symbol is used to represent the multiplication operation and the consequent product. It is often referred to as the times sign or the dimension sign.
Given an elevator can carry 25 adults or 30 children at one time.
One day the elevator carries a full passenger load 36 times.
If the elevator carries all adults, then it carries (25 × 36) = 900 adults.
If the elevator carries all children, then it carries (30 × 36) = 1080 adults.
If all the passengers were children, then the elevator carry more than (1080 - 900) = 180 people if all the passengers were adults.
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with one method of a procedure called acceptance sampling, a sample of items is randomly selected without replacement and the entire batch is accepted if every item in the sample is okay. the abc electronics company has just manufactured 1200 write-rewrite cds, and 150 are defective. if 3 of these cds are randomly selected for testing, what is the probability that the entire batch will be accepted?
The probability that the entire batch will be accepted.
What is Acceptance Sampling?
Acceptance sampling is a statistical measure used in quality control. It allows a company to determine the quality of a batch of products by selecting a specified number for testing.
abc Electronics Company manufactured 1200 write-rewrite cds, and 150 are defective. Since 150 are defective, the number of write-rewrite cds that would be accepted is (1200 - 150 = 1050).
Since the items at selected without replacement, the number of write-rewrite cds will continue to decrease anytime a write-rewrite cds is taken out. For example if they are 1050 accepted write-rewrite cds if one is taken out they would then be 1049 accepted write-rewrite cds, and if another one is taken out they would be 1049 accepted write-rewrite cds and so on.
If 3 of these cds are randomly selected for testing without replacement,
The probability that the entire batch will be accepted
= (1050/1200) × (1049/1200) × (1048/1200) × (1047/1200)
= 0.8750 × 0.8742 × 0.8733 × 0.8725
=0.5828
The probability that the entire batch will be accepted is 0.5828 .
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Find the value of x. Round to the nearest tenth: 29,26, and 50
The value of x is 23.22°. By using the Cosine rule
Cosine RuleThe Cosine Rule of trigonometry states that the square of any side of a given triangle is equal to the sum of the squares of the other sides minus twice the product of the other two sides multiplied by the cosine of the angle included between them. The Law of cosines and Cosine Formula are other names for the cosine rule.
The expression for representing cosine rule is expressed as:
c² = a² + b² - 2ab cos C
Given,
a = 26
b = 50
c = 29
Substituting the value to the equation:
c² = a² + b² - 2ab cos C
29² = 26² + 50² - 2(26)(50) cos C
841 = 676 + 2500 - 2600cosC
2335 =2600cos C
cos C = [tex]\frac{2335}{2660}[/tex]
C = 23.22°
The value of x is 23.22°
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Answer: 23.2 rounded to nearest tenth
Step-by-step explanation:
which statement describes whether marjan’s graphs are correct
Yes, g(x) is a 3 unit translation down after a reflection of f(x) over the x-axis.
What is meant by graphs?The set of ordered pairs with the f(x) = y is the graph of a function f in mathematics. These pairs, which are Cartesian coordinates of points in two-dimensional space and thus constitute a subset of this plane in the typical case where x and f(x) are real numbers, are examples of real numbers.
Pie charts, line graphs, bar graphs and histograms, and Cartesian graphs are likely the four most popular types. They are typically utilized for, and are most effective for, very different purposes. You'd employ: Bar graphs are used to display numbers that are unrelated to one another.
Use line/area charts if your data is continuous, or bar charts or histograms if your data is nominal. Use a scatter plot, bubble chart, or line chart to illustrate how the values in your dataset relate to one another.
y = −f(x) Reflects it about x-axis
y = f(x) + C C < 0 moves it down
The complete question is:
Consider the function f(x) = x3 + 0.5x – 1. Marjan needs to graph f(x) and g(x) = –f(x) – 3. His graphs are shown below. Which statement describes whether Marjan’s graphs are correct? No, the reflection should be over the x-axis, not the y-axis. No, the reflection should be over the y-axis, not the x-axis. Yes, g(x) is a reflection of f(x) over the y-axis followed by a translation of 3 units down. Yes, g(x) is a reflection of f(x) over the x-axis followed by a translation of 3 units down.
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What are two points that represent Justine‘s function for the yards left to hike in terms of the hours she spent hiking?
The two points that represent Justine‘s function for the yards left to hike in terms of the hours she spent hiking are; (0, 320) and (4, 0)
How to find the correct coordinates?
From the table in the attached file, we see that;
Justine started when Michael was 320 yards from the top.
This coordinate is expressed as (0,320)
where;
0 represents the time Justine started
320 represents the number of yards left.
Now, it is clear that every minute, Justine covers 80 yards.
Thus;
After 1 minute, Justine will have:
(320 - 80) yards left
After 2 minutes, Justine will have:
(320 - 80 - 80) yards left
After 3 minutes, Justine will have:
(320 - 80 - 80 - 80) yards left
After n minutes, Justine will have;
(320 - 80n) yards left
Thus, the possible coordinates are:
(0, 320), (1, 240), (2, 160), (3, 80), (4, 0)
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Popular wisdom is that eating presweetened cereal tends to increase the number of dental caries (cavities) in children A sample of children was (with parental consent) entered into a study and followed for several years. Each child was classified as a sweetened-cereal lover or a unsweetened cereal lover. At the end of the study, the amount of tooth damage was measured. Here are the summary data: 10 15 Mean 6.41 5.20 Std Dev 5.0 15.0 225 Sweetened Unsweetened Assuming the necessary conditions for inference are met, which of the following an approximate 95% confidence interval for the difference in the mean tooth damage?
O (6.41 -5.20) + 2.145 3+
O (6.41 - 6:20) +1.96 Vi+
O (6.41 -- 5.20) +1,96/13 + 38
O (6.41 -5.20) +2.202/33+
O (6.41 - 5:20): 2.2821+13 228 X
An approximate 95% confidence interval for the difference in the mean tooth damage is (6.41 - 5.20) ± 2.26[tex]\sqrt{\frac{25}{10}+\frac{225}{15} }[/tex]
For sweetened samples
The value of n = 10
The mean of the samples = 6.14
The standard deviation of the sample = 5.0
For unsweetened samples
The value of n = 15
The mean of the sample = 5.20
The standard deviation of the sample = 15.0
We have to assume that necessary conditions for inference are met
The confidence interval = 95%
The equation will be
(6.41 - 5.20) ± 2.26[tex]\sqrt{\frac{25}{10}+\frac{225}{15} }[/tex]
Therefore, the difference in the mean tooth damage is (6.41 - 5.20) ± 2.26[tex]\sqrt{\frac{25}{10}+\frac{225}{15} }[/tex]
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HELP MEEEEEEEEEEEEEEEEEEEEEEEE PLEASEEEEEEEEEEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!!
when will the height be 37 feet?
As the tree grows 1& 3/4 feet per year, it will take 9 years to reach a height of 37 feet.
What is division?Division is a basic procedure in which an integer is divided. It's best to imagine of it as a number of things being distributed among a particular number of persons, such as in the previous example. In mathematics, division is the process of dividing a number into equal parts and determining how many equal parts can be made. For instance, dividing 15 by 3 implies dividing 15 into three equal groups of five. Dividend Divisor = Quotient + Remainder is the formula for dividing two numbers. The dividend is the number that is being divided in this case. The divisor is the number, which divides the number (dividend) into equal parts.
Here,
37 - 21 and 1/4 = 36 and 4/4 - 21 and 1/4 = 15 and 3/4 = 63/4
63/4 divided by 1 and 3/4 = 63/4 divided by 7/4 = 63/4 * 4/7 = 9 years
It will take 9 years to reach at the height of 37 feet as the tree grow 1& 3/4 feet per year.
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Complete question:
A tree grow 1& 3/4 feet per year. How long will it take the tree to grow from a height of 21 & 1/4 feet to a height of 37 feet?
Need help on tis promblommm
Answer:
C,D
Step-by-step explanation:
C and D are multiplying 250 by a number greater than one so the result will be greater than 250
The first two are multiplying 250 by a frction less than one....the result will be less than 250
dollar general sends out a $5 off coupon to its email subscribers. what percentage of customers between 20 and 30 years of age who lived within 5 miles of the store used the coupon?
The classification model is used to define the percentage of customers between 20 and 30 years of age who lived within 5 miles of the store used the coupon.
Percentage:
In math, number or ratio that can be expressed as a fraction of 100 refers the percentage.
Given,
Here we have a dollar general sends out a $5 off coupon to its email subscribers.
And we need to find the percentage of customers between 20 and 30 years of age who lived within 5 miles of the store used the coupon.
Then the model used to define the this type of situation is refers as the classification model, because in this model, we have classify the given group of people based on the constraint.
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Write the equation of a line with an undefined slope through the point (-4, 2)
Answer:
x = - 4
Step-by-step explanation:
A line with an undefined slope is a vertical line parallel to the y- axis with equation
x = c ( c is the value of the x- coordinates the line passes through )
the line passes through (- 4, 2 ) with x- coordinate - 4 , then
x = - 4 ← equation of line
How many inches is there in 1/8th of a yard?
Answer:
4.5
Step-by-step explanation:
You calculate it. look 1 yard is 36 inches. so 1/8 of a yard is 36 divided by 8. 4.5!
f(x) = 2x² + 12x + 16
What is the average rate of change of f(x) on the interval [-3, -2].
[tex]\begin{array}{llll} f(x)~from\\\\ x_1 ~~ to ~~ x_2 \end{array}~\hfill slope = m \implies \cfrac{ \stackrel{rise}{f(x_2) - f(x_1)}}{ \underset{run}{x_2 - x_1}}\impliedby \begin{array}{llll} average~rate\\ of~change \end{array} \\\\[-0.35em] ~\dotfill[/tex]
[tex]f(x)= 2x^2 + 12x +16 \qquad \begin{cases} x_1=-3\\ x_2=-2 \end{cases}\implies \cfrac{f(-2)-f(-3)}{-2 -( -3)} \\\\\\ \cfrac{[2(-2)^2 + 12(-2) + 16]~~ - ~~[2(-3)^2 + 12(-3) + 16]}{-2+3} \\\\\\ \cfrac{[8-24+16]~~ - ~~[18-36+16]}{1}\implies 0-(-2)\implies \text{\LARGE 2}[/tex]
A submarine dives 20 m each minute for 15 minutes. What is the total change in depth after 15 minutes?
Answer:
Step-by-step explanation:300 mStep-by-step explanation:20 meters per minute. 15 minutes it dives. 20x15 is 300
what expression is equivalent to 3/4a + 2/3 - 1/2a - 1/3 + 1/2a
Answer:
(3/4)a + 1/3
Step-by-step explanation:
3/4a + 2/3 - 1/2a - 1/3 + 1/2a
(3/4)a + (2/3) - (1/2)a - (1/3) + (1/2)a [added () to clarify. Is "3/4a" (3/4)a or 3/(4a)?
(3/4)a + (2/3) - (1/2)a - (1/3) + (1/2)a
(3/4)a - (1/2)a - (1/3) + (1/2)a + (2/3)
(3/4)a - (1/2)a + (1/2)a - (1/3) + (2/3) [Rearrange: like terms together]
a[(3/4) - (1/2) + (1/2)] - (1/3) + (2/3) [bring out the "a"]
a[(3/4)] + (1/3) [simplify]
(3/4)a + 1/3
The volume of a cone with height 29 cm is 1758 CM3, find the radius of the conw
Answer:13.77 cm.
Step-by-step explanation:
r = sqrt((3V)/(pih))
= sqrt((31758)/(pi29))
= sqrt((5274)/(pi*29))
= sqrt(182.16)/(pi/29)
= 13.77 cm
Solve pls brainliest
Answer:
d = 9.43398113206
Step-by-step explanation:
d=√((x2 – x1)² + (y2 – y1)²)
d = √((-4-1)² + (5+3)²)
d = √((-5)² + (8)²)
d = √(25 + 64)
d = √89
d = 9.43398113206
The values of f(x) and g(x) are shown for selected values of x in the table below. x f(x) g(x) 0 0 1 1 3 2 2 6 4 3 9 8 4 12 16 Of these two functions, one is exponential and the other is linear. Determine which of the functions is linear, and explain why this must be the case.
The linear function is f(x) and the exponential function is g(x).
What is an exponential function?The exponential function is a mathematical function that is represented by e^x. Unless otherwise specified, the term refers to a positive-valued function of a real variable, though it can be extended to complex numbers or generalized to other mathematical objects such as matrices or Lie algebras.
Linear functions have a straight line as their graph. The following is the form of a linear function. y = f(x) + a+bx There is one independent variable and one dependent variable in a linear function.
In this case, the function for g(x) is 2^x.
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What is the center and radius of the circle defined by the equation x² y² 49?
The equation x² + y² = 49 can be written in standard form as (x-0)² + (y-0)² = 49, which is the equation for a circle with a center at (0, 0) and a radius of 7.
The equation for a circle is (x-h)² + (y-k)² = r², where (h, k) represents the center of the circle and r represents the radius.
In order to find the center (h, k) and radius (r) of the circle, we need to rearrange the equation to put it in the standard form. To do this, we subtract 49 from each side of the equation, which will give us x² + y² - 49 = 0. Then, we can factor the equation to get (x² + y²) - 7(7) = 0. This can be further simplified to (x + 7)(x - 7) + (y + 7)(y - 7) = 0.
Since there are no solutions for (x + 7) or (x - 7) when set equal to 0, we can conclude that the equation for the circle is (x-0)² + (y-0)² = 49, which is the equation for a circle with a center at (0, 0) and a radius of 7.
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invert a multiply to evaluate the division expression 3/4 ÷ 1/3 help
To multiply the division expression 3/4 ÷ 1/3 is 9/4. Division expressions are mathematical expressions using division
What is meant by mathematical expression ? When numbers and variables are properly combined using operations like addition, subtraction, multiplication, division, exponentiation, and other as-yet-unlearned operations and functions, a set of mathematical symbols known as an expression is produced. For instance, "4 added to 2" will have the mathematical formula 2+4. Addition, subtraction, multiplication, and division are all considered operations. There are a lot more operations that can be employed in a mathematical equation. You must substitute a number for each variable and carry out the arithmetic operations in order to evaluate an algebraic expression. Since 6 + 6 equals 12, the variable x in the example above is equal to 6.3/4 : 1/3
= 3/4 · 3/1
= 3·3/4.1
= 9/4
Hence this proved.
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a popular magazine tests cars and trucks for mileage on the road and around the city. the magazine reports that 50% of the cars tested had mileages below 24.7 mpg on the road, and the other 50% of the cars tested had mileages above 24.7 mpg. which statistic does this 24.7 represent?
The decimal number 24.7 represents the average mileage of the vehicle.
What are statistics?Statistics is the study of collection, analysis, interpretation, and presentation of data or discipline to collect and summarise the data.
A famous magazine tests vehicles and trucks for mileage out and about and around the city. the magazine reports that half of the vehicles tried had mileages beneath 24.7 mpg out and about, and the other half of the vehicles tried had mileages above 24.7 mpg.
The decimal number 24.7 means the vehicle can cover 24.7 miles with each gallon of gas.
The decimal number 24.7 represents the average mileage of the vehicle.
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Which is the smallest positive integer that can be written as the product of two cubic integers?
Answer: 8
Step-by-step explanation:
=(1) ^3×(2) ^3
=1×1×1×2×2×2
=1×8
=8
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Suppose that the average cost, in dollars, of producing a shipment of a certain product is C = 5,000x + 20,000/x, x > 0 where x is the number of machines used in the production process. (a) Find the critical values of this function. (Assume 0 < x < [infinity]. Enter your answers as a comma-separated list.) x = Incorrect: Your answer is incorrect. (b) Over what interval does the average cost decrease? (Enter your answer using interval notation.) (c) Over what interval does the average cost increase? (Enter your answer using interval notation.)
The average cost function is C(x) = 5000x + 20,000/x, where x is the number of machines used in the production. The critical value is C(x) = 20,000 and it happens when x = 2.
If we have a function f(x), the critical point happens when its first derivative is equal to zero.
f '(x) = 0
In the given problem, the function is:
C(x) = 5000x + 20,000/x
Take the derivative:
C '(x) = 5000 - 20,000/x² = 0
5000 x² = 20,000
x² = 4
x = ±2
Since x is within the interval: 0<x<∞, the solution is x = 2
Substitute x = 2 into the function:
C(2) = 5000 (2) + 20000/2
C(2) = 10000 + 10000 = 20,000
Hence, the critical value is C(x) = 20,000 and it happens when x = 2.
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suppose that the number of miles that a car can run before its battery wears out is exponentially distributed with an average value of 11k miles. (a) what is the probability that the battery lasts between 12k and 14k miles?
The probability that the battery lasts between 12,000 and 14,000 miles is approximately 0.084.
The number of miles that a car can run before its battery wears out follows an exponential distribution with an average value of 11,000 miles. The probability that the battery lasts between 12,000 and 14,000 miles can be calculated as follows:
P(12,000 < x < 14,000) = P(x < 14,000) - P(x < 12,000)
To calculate the probabilities on the right-hand side of the equation, we can use the formula for the cumulative distribution function (CDF) of an exponential distribution:
F(x) = 1 - e^(-x/λ)
where λ is the mean value of the distribution. In this case, λ = 11,000 miles.
Plugging in the values and solving, we get:
P(12,000 < x < 14,000) = F(14,000) - F(12,000)
= (1 - e^(-14,000/11,000)) - (1 - e^(-12,000/11,000))
= e^(-12,000/11,000) - e^(-14,000/11,000)
≈ 0.242 - 0.158
≈ 0.084
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How do you simplify 27^(3/4)?
By simplifying the above equation i.e 27^(3/4) we get, 9 x (3)^(1/4).
Simplification is the process of substituting a mathematical expression with a simpler (typically shorter) counterpart. A fraction is simplified to an irreducible fraction. In computer algebra, expressions are simplified.
In order to simplify the given equation we need to factorize the bases. You can see that in the following steps :
(a^b)^c=a^(bc)
a^(b+c)=a^b x a^c
By using this above equation, we can factorize the bases.
So, factorization would be equal to :
27 ^(3/4) = ((3^3) )^ (3/4)
= 3^(9/4)
= 3^ (2+1/4)
= 3^2 x 3^(1/4)
= 9 x 3^(1/4)
That’s how we simplified the given equation.
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write a system of linear equations in which (2, -1) is a solution of equation 1 but not a solution of equation 2, and (5, 5) is a solution of the system.
The system of linear equation of the line are y=2x-5 when (2,-1) is a solution of the first equation but not for the second equation.
Given that,
We have to find the system of linear equation in which (2,-1) is a solution of the first equation but not for the second equation and (5,5) is a solution for system of equation.
We know that,
To find the system of equation we have a formula that is
y=mx-mx₁+y₂
Here m is slope
m=-1-5/2-5
m=-6/-3
m=2
The equation is
y=2x-2(5)+5
y=2x-10+5
y=2x-5
Therefore, The system of linear equation of the line are y=2x-5 when (2,-1) is a solution of the first equation but not for the second equation.
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Graph f(x) = √√x+2 over the domain -2 ≤x≤7.
The graph of the function square root of the square root of x + 2 in the given domain is given by the image shown at the end of the answer.
How to graph the function?The function for this problem is defined as follows:
f(x) = √√x+2
The double square root means that in reality, we have the fourth root of the function, hence the function is then defined as follows:
f(x) = fourth root(x + 2).
The fourth root function is defined for values of x for which the inner term is zero and greater, hence:
x + 2 >= 0
x >= -2.
Then the graph is made over a domain that goes until x = 7, and is given by the image presented at the end of the answer.
(the domain is chosen because it is the domain given by the problem).
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Three ballet dancers are positioned on stage. Oliver Is 6.3 feet straight behind Dana and 6.3
feet directly left of Ashley. When the music begins, Oliver twirls to Ashley's position, then
leaps to Dana's position, and finally walks back to his original position. How far did Oliver
travel? If necessary, round to the nearest tenth.
Oliver travelled the distance of 21.5 ft
What is perimeter?
The complete length of a shape's edge serves as its perimeter in geometric terms. Adding the lengths of all the sides and edges that surround a form yields its perimeter. It is calculated using linear length units such centimeters, meters, inches, and feet.
As shown in the figure, we need to find the perimeter of the triangle ABC.
Perimeter = g + h +f ............(1)
g=f = 6.3 ft
Finding h using pythogoras theorem formula:
h² = g² + f²
= 6.3² + 6.3²
= 79.38
h =√79.38 = 8.909 ≈ 8.9 ft
So, (1) => Perimeter = 6.3 + 6.3 + 8.9 = 21.5 ft
Thus, Oliver travelled the distance of 21.5 ft
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an equation is written to represent the relationship between the temperature in alaska during a snow storm, y, as it relates to the time in hours, x, since the storm started. if the storm lasted five hours and the temperature saw a drop from 0o to - 20o, which quadrant(s) of a coordinate grid should be used to display this data?
The first and fourth quadrant of a coordinate grid should be used to display the given data .
In the question ,
it is given that ,
from the time the storm has started the temperature change is from 0° to - 20° .
we know that time cannot be in negative , and temperature can be both negative and positive .So only quadrant 1 and 4 can be used for representation .
Y = temperature
X = time
Quadrant 1 = (+x , +y) this can be used because x can only be positive and y is also positive.
Quadrant II = (-x , +y) this cannot be used because x cannot be negative
Quadrant III = (-x , -y) this cannot be used because x cannot be negative
Quadrant IV = (+x , -y) this can be used because x can only be positive and y can be negative.
Therefore , only 1 and 4 quadrants can be used .
The given question is incomplete , the complete question is
An equation is written to represent the relationship between the temperature in Alaska during a snow storm, y, as it relates to the time in hours, x, since the storm started. if the storm lasted five hours and the temperature saw a drop from 0° to - 20°, which quadrant(s) of a coordinate grid should be used to display this data ?
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