In linear equation, A = - 27/7 and B = 140/7 are mg of medicine are contained.
What in mathematics is a linear equation?
An algebraic equation of the form y=mx+b is referred to as a linear equation. m is the slope, and b is the y-intercept, and all that is involved is a constant and a first-order (linear) term. The variables in the preceding equation are y and x, and it is occasionally referred to as a "linear equation of two variables."Let one dose be x.
Other does will be 11 - x ............ y
4x + 11 ( 11 - x) = 148
4x + 121 - 11x = 148
-7x = 148 - 121 = 27
x = - 27/7
y = 140/7
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what is the GCF of 18 and 28?
Answer:2
Step-by-step explanation:
Harriet counts 15 big boxes and 12 small boxes of notebooks. Each large box contains 189 notebooks, and each small box contains 79 notebooks. Estimate the total number of notebooks. Is your estimate an overestimate or an underestimate? Explain why it is better to have an overestimate than an underestimate. WILL GIVE 95 POINTS
Answer:15 big boxes with 189 notebooks each: 20 * 200 = 4,000
12 small boxes with 79 notebooks each: 10 * 80 = 800
4,000 + 800 = 4,800
There are approximately 4,800 notebooks, this is an overestimate as I rounded up.
Step-by-step explanation:
Hazel and Luna are in different sections of MTH 134. They both took Test 1 and their instructors indicated that in each section, the scores fell into a normal distribution. Hazel made a score of 93 points and Luna made a score of 68 points. In Hazel's section, the Test 1 scores had a mean of 80 and a standard deviation of 8. In Luna's section, the mean was 40 with a standard deviation of 15. Use the Empirical Rule to determine which student did "better" and why.
Using z-scores, it is found that due to the higher z-score, Luna did better on the exam.
What are z-scores?The z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.From the two bullet points, it is found that the student who did "better" is the one whose grade has the higher z-score.
For Hazel, the parameters are given as follows:
[tex]X = 93, \mu = 80, \sigma = 8[/tex]
Hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
Z = (93 - 80)/8
Z = 1.625.
For Luna, the parameters are given as follows:
[tex]\mu = 68, X = 40, \sigma = 15[/tex]
Hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
Z = (68 - 40)/15
Z = 1.87.
Due to the higher z-score, Luna did better on the exam.
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Jessica had $7 and her sister had $2. After their parents gave each of them an equal amount of money, Jessica had twice as much money as her sister. How much money did their parents give each of them?
Answer:
$3:00
Step-by-step explanation:
let 'x' be the money that the parents gave to Jane and her sister each
Jane will have 7+x dollars
Jane's sister will have 2 + x dollars
Jane had twice as much money as her sister thus
7 + x = 2(2 + x)
7 + x = 4 + 2x
4 + 2x = 7 + x
2x - x = 7 - 4
x = $3
the parents gave $3 to each.
What is the yield on a corporate bond with a $1000
face value purchased at a discount price of $900, if
it pays 7% fixed interest for the duration of the
bond?
yield = [?] %
Give your answer as a percent rounded to the nearest
hundredth.
The yield on the corporate bond of a face value of $1000 is 7.77%.
What is the percentage discount?
The percentage discount is the discount given on a product as compared to the given discount on 100 rupees.
Given, the face value of the bond is $1000.
Discounted price of the bond is $900.
Therefore, the fixed interest on the bond for that period will be
= $1000 × 7/100 = $70.
Now, the yield on that corporate bond = 70 × 100/900 % = 7.77% .
Hence, the yield on the corporate bond of a face value of $1000 is 7.77%.
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(2x+4)(x-4) multiply
Answer: 2x²-4x-16
Step-by-step explanation:
[tex](2x+4)(x-4)=\\2x(x)+2x(-4)+4(x)+4(-4)=\\2x^2-8x+4x-16=\\2x^2-4x-16[/tex]
Cheese, bologna, and peanut butter sandwiches were made for a picnic in a ratio of 5 to 7 to 8. If a total of 120 sandwiches were made, how many bologna sandwiches were made?
42 bologna sandwiches were made
How many bologna sandwiches were made?The ratio is given as
Cheese : Bologna : Peanut butter = 5 : 7 : 8
Also, we have
Total = 120 sandwiches
The number of bologna sandwiches made is calculated using
Bologna = bologna ratio/total ratio * 120
So, we have
Bologna = 7/(5 + 7 + 8) * 120
Evaluate
Bologna = 42
Hence, 42 bologna sandwiches were made
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given the first term and the term-to-term rule, write down the first six terms of each sequence.
b) first term: 2 term-to-term rule add 9
Step-by-step explanation:
a1 = 2
a2 = a1 + 9 = 2 + 9 = 11
a3 = a2 + 9 = 20
a4 = a3 + 9 = 29
a5 = a4 + 9 = 38
a6 = a5 + 9 = 47
you’re buying 60 acres Of farmland at a cost of 372000
What is the cost per acre
What would be the cost for 70 acres
Answer:
Per acre will cost 6200
70 acres will cost 434,000
Step-by-step explanation:
you’re buying 60 acres Of farmland at a cost of 372000
1) What is the cost per acre
solutionIn order to find the cost per acre we divide the values which is;
➟ 372000 ÷ 60
➟ 6200
∴ it will cost 6200 per acre
2) What would be the cost for 70 acres
solutionto find how much it will cost for 70 acres we will multiply the value per acre by 70 which is;
➟ 6200 × 70
➟ 434,000
∴ it will cost 434,000 for 70 acres
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.61 and a standard deviation of 0.39. Using the empirical rule, what percentage of the students have grade point averages that are between 1.83 and 3.39?
As a result, 95% of the students had grade point averages ranging from 1.83 to 3.39.
What exactly is a normal distribution?A normal distribution is a data set design in which the majority of values cluster around the middle of the range and the remainder taper off symmetrically toward either end.
What is the significance of the term "normal distribution"?The normal distribution is also known as the bell curve because the probability density graph resembles a bell. It is also known as the Gaussian distribution, after German mathematician Carl Gauss, who described it initially.
According to the given data:A bell-curve distribution is a normal Distribution.
Let X be the grade point averages of undergraduate students at one university.
X ~ Normal Distribution(2.61,(0.39)2)
P(1.83 < X < 3.39)
= P(X < 3.39) - P(X < 1.83)
= P((X - μ)/σ < (3.39 - 2.61)/.39) - P(((X - μ)/σ)< (1.83 - 2.61)/039)
= P(z < 2) -P(z < -2)
= P(-2 < z < 2)
Thus, given a regular normal distribution (μ=0, σ =1), z is between 2 standard deviations away from the mean.
According to the Empirical Rule, 95% of the data obtained after a normal distribution is within two standard deviations of the mean.
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How long, in seconds, should a bus take to travel 5000 m at an average speed of 10 m/s?
Answer:
10 분
Step-by-step explanation:
A fox sees a rabbit 35 feet away and starts chasing it. As soon as the fox starts
moving, the rabbit sees it and starts running away at a speed of 40 feet per second.
What should the fox's speed be to catch up to the rabbit in no more than 10 seconds?
Can someone help me with this
thanks so much for the help!
The domain of the function is all the real numbers and the range is from -2 to 2.
What are domain and range?
The range of values that we are permitted to enter into our function is known as the domain of a function. The x values for a function like f make up this set (x).
A function's range is the collection of values it can take as input. After we enter an x value, the function outputs this sequence of values.
In the image, we can see that the value of the function varies from -2 to 2 at all the possible values of the real numbers.
Therefore, the domain of the function is all the real numbers and the range is from -2 to 2.
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1.Solve for y.
y = 20
y = 120
y = 60
y = 10
Need to find the value of x
Answer:
x=2
Step-by-step explanation:
Because these angles are the same you can do: 10x-14=7x-8. By doing simple math you'll get x=3 as you answer
Answer:
x = -18/7 y simplified as -2.57143y
Step-by-step explanation:
to figure this out and find the excluded value, first set the denominator equal to 0, because fractions represent division and dividing by 0 isn't defined. that will give us 7x+18y=0.. move the variable to the right hand side and change it sign.. which will be 7x=-18y, now divide both side by 7, = x=-18/7y / -2.57143y
Hannah is the oldest of four siblings whose ages are consecutive integers the sum of their ages is 86 fine Hannah's age
Answer:
20, 21,22,23
Step-by-step explanation:
Consecutive means in order. Integers are the set of whole numbers and their opposites: ...-3,-2,-1,0 ,1,2,3...
Let x = the one sibling
Let x + 1 = the second sibling
Let x + 2 = the third sibling
Let x+4 = the fourth sibling.
If you add the four siblings together they equal 86
(x) + (x +1) + (x + 2) + (x+3) = 86 I put the parentheses in so that you can see each sibling, but it is not needed.
x + x+ 1 +x + 2 + x+ 3 = 86 Combine like terms
4x + 6 = 86 Subtract 6 from both sides
4x = 80 Divide both sides by 4
x = 20
The first sibling is 20, then 21, then 22 and finally 23
Check:
20 + 21 + 22 + 23 = 86
Clare is cycling ata speed of 12. Miles per hour if she starts at a position chosen as zero what will
Clare will have traveled 9 miles in 45 minutes.
What is speed?The definition of speed is the rate at which an object's position changes in any direction. Speed is defined as the ratio of distance traveled to time spent traveling.So, Clare is riding her bike at a speed of 12 miles per hour.
Her starting point is zero.Distance traveled in 45 minutes or 45/60 hours at the same speed will be = Speed Time
= 12 × 45/60= 45/5= 9 milesTherefore, Clare will have traveled 9 miles in 45 minutes.
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Solve the equation
2(4-5x)=3(4x+3)
Answer:
-1 /22
Step-by-step explanation:
1his is a fraction kinda thing so put -1 at the top like a numerator and the 22 go at the bottom like the denominator
a blank chart shows open and close prices and highs and lows, but over a long time period it can also show pricing blank
Based on the information given, it can be deduced that the chart that is being described is the OHLC chart.
A statistical graph or chart is defined as the pictorial representation of statistical data in graphical form. The statistical graphs are used to represent a set of data to make it easier to understand and interpret statistical information.
It should be noted that an open-high-low-close chart (OHLC) chart simply means a type of chart that's used to illustrate the movements in the price of a financial instrument for a particular period of time.
The vertical line on the chart illustrates the price range over a unit of time. It's useful in assessing volatility as it shows the full price range of the period.
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Identify the key characteristics of the parent fifth-root function f(x)=x Include the following domain, range, intervals where the function is increasing, decreasing, or constant, intercepts, whether the function is even, odd, or neither, whether the function is continuous or discontinuous, asymptotes, and end behavior. (4 pts.)
From the graph of the fifth root function, we have that:
The domain and the range are all real values.The function is increasing for all real values, and never decreasing nor constant.The x-intercept is of x = 0.The y-intercept is of y = 0.The function is odd.The function is continuous.The function has no asymptotes.The end behavior is that y -> - ∞ when x -> -∞ and y -> +∞ when x -> +∞.What are the domain and the range of a function?The domain of a function is the set that contains all the values of the input.The range of a function is the set that contains all the values of the output.In a graph:
The domain is given by the x-values, the horizontal axis.The range is given by the y-values, the vertical axis.Hence, since the given graph has no holes, and keeps going to infinity, we have that both the domain and the range are all real values.
Since the function has no holes, it is also continuous, and has no vertical asymptotes.
When a function is increasing and when it is decreasing, looking at it's graph?Looking at the graph, we get that a function f(x) is increasing when it is "moving northeast", that is, to the right and up on the graph, meaning that when x increases, y increases.Looking at the graph, we get that a function f(x) is decreasing when it is "moving southeast", that is, to the right and down the graph, meaning that when x increases, y decreases.For this problem, we have that the function is moving right and up over it's entire domain, hence it is increasing for all real values, and never decreasing nor constant.
What are the intercepts of a function?The x-intercept of a function is given by the value of x when f(x) = 0, that is, the value of x when the function crosses the x-axis.The y-intercept of a function is given by the value of f(x) when x = 0, that is, the value of y when the function crosses the y-axis.Since the graph passes through the origin, we have that:
The x-intercept is of x = 0.The y-intercept is of y = 0.What are even and odd functions?In even functions, we have that f(x) = f(-x) for all values of x.In odd functions, we have that f(-x) = -f(x) for all values of x.If none of the above statements are true, the function is neither.For this problem, looking at the graph, we have the the second statement holds true for all values of x, hence the function is odd.
What is the end behavior of the function?It is given by the values of y when x -> ∞.
Hence:
For the end behavior, y -> - ∞ when x -> -∞ and y -> +∞ when x -> +∞.
Since f(x) -> ∞ when x -> ∞, the function has no asymptotes.
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Given that xy = 36 and x - y = 5, Find the value of x² + y².
Answer:
97
Step-by-step explanation:
To find x² + y², use the identity (x - y)² = x² + y² - 2xy.
(x - y)² = x² + y² - 2xy
Substitute xy = 36 and x - y = 5 in the above formula,
5² = x² + y² - 2*36
25 = x² + y² - 72
Add 72 to both sides,
25 + 72 = x² + y²
x² + y² = 97
An airplane’s altitude in feet during its descent for landing can be found using the function f(x) = −300x + 30,000, where x represents the horizontal distance in miles from where the plane begins its descent. After new government regulations become law, the airplane’s
descent will be modeled by the function g(x) = −300x + 30,500. Which statement describes this change?
A. The airplane descends 500 feet per horizontal mile slower
B. The airplane starts its descent from an altitude 500 feet higher
C. The airplane descends 500 feet per horizontal mile faster
D. The airplane starts its descent from an altitude 500 feet lower
Answer:
B. The airplane starts its descent from an altitude 500 feet higher
Step-by-step explanation:
f(x) = −300x + 30,000
the function itself represents the airplane's altitude. the y intercept, 30,000 ft, then represents the initial starting position of the plane.
when it changes
g(x) = −300x + 30,500
only the y intercept changes. it's now 30,500 ft, which is 500 more than before. that means the plane initial position is 500 feet higher.
since the term with x doesn't change, the rate will not be affected. the answers with slower or faster talks about rate, which isn't what changed.
Factor completely. x^8-1/81
Answer:
Step-by-step explanation:
[tex]\displaystyle\\ x^8-\frac{1}{81} \\\\x^8-\frac{1}{3^4} =\\\\x^8-(\frac{1}{3})^4 =\\\\x^{4*2}-(\frac{1}{3})^{2*2}= \\\\(x^4)^2-((\frac{1}{3} )^2)^2=\\\\(x^4-(\frac{1}{3})^2)(x^4+(\frac{1}{3} ) ^2)=\\\\(x^{2*2}-(\frac{1}{3})^2)(x^4+\frac{1^2}{3^2} )=\\\\((x^2)^2-(\frac{1}{3})^2)(x^4+\frac{1}{9})=\\\\(x^2-\frac{1}{3} )(x^2+\frac{1}{3})(x^4+\frac{1}{9})[/tex]
If Fernando paid $450 for a netbook that was 75% of the original price, what was the original price?
Answer:
$600
Step-by-step explanation:
450 = 3/4 (because 75%=3/4)
450/3=150. 150 = 1/4, or 25%. Now it's just as simple as multiplying 150 4 times to get 100%, or the original cost, 150 times 4 equals 600. Therefore the notebooks original price is $600
Use interval notation to express the following:
The set of all numbers less than or equal to 1
The interval notation that expresses the statement is (-∝, 1]
How to use interval notation to express the statement?The statement is given as:
The set of all numbers less than or equal to 1
The above can be represented as:
<= 1
Represent the set with variable x
So, we have
x <= 1
As an interval notation, we have (-∝, 1]
Hence, the interval notation that expresses the statement is (-∝, 1]
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he table represents a linear equation. A two column table with 5 rows. The first column, x, has the entries, negative 10, negative 5, 10, 15. The second column, y, has the entries, 8, 7. 4, 3. Which equation shows how (–10, 8) can be used to write the equation of this line in point-slope form?
Equation of the line in point slope form passing through (-10,8) for the given coordinates (-10,8), (-5, 7) , (10,4), (15,3) of linear equation is
(y - 8)=(-1/5)(x+ 10).
As given,
Given points of linear equation: (-10,8), (-5, 7) , (10,4), (15,3)
Consider (x₁, y₁)=(-10,8) and (x₂ ,y₂)=(-5,7)
Slope 'm'=(y₂-y₁)/(x₂-x₁)
=(7-8)/(-5+10)
=-1/5
Equation of line passing through (-10,8) in point slope form:
y-y₁=m(x-x₁)
⇒(y -8)=(-1/5)(x+10)
⇒y=1/5(-x+30)
Therefore, equation of the line in point slope form passing through (-10,8) for the given coordinates (-10,8), (-5, 7) , (10,4), (15,3) of linear equation is
(y - 8)=(-1/5)( x + 10).
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How to solve this math equation, a+2=5
Answer:
a = 3
Hope this helps :)
Explanation and Check part below.
Step-by-step explanation:
1. Isolate the variable by doing the inverse operation which is in this case subtracting 2 on both sides of the equation.
a + 2 = 5
- 2 - 2
a = 3
Check:
1. Substitute a with the solution 3.
3 + 2 = 5
5 = 5 ✓
Find x for this equation
Show clear algebraic fraction
Step-by-step explanation:
cross multiply both sides
2(6x+1)=3(5x–2)
12x+2=15x–6
collect like terms
+2+6=15x–12x
8=3x
divide both sides by 3
8\3=3x\3
therefore, the final answer is
8\3
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A population has SS= 50 and s^2 = 5. How many scores, (N).are in the population?
There are 11 scores, (N) in the population.
How many scores, (N) are in the population?The given parameters are:
Variance, s^2 = 5
Sum of squares, SS = 50
The variance of the population is calculated using
s^2 = SS/[N - 1]
So, we have
5 = 50/[N - 1}
Cross multiply
So, we have
5(N - 1) = 50
This gives
N - 1 = 10
Add 1 to both sides
N = 11
Hence, there are 11 scores, (N) in the population.
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A jar contains 4 red marbles, 5 yellow marbles, 3 green marbles, and 3 blue marbles.
1. If two marbles are selected at random without replacing between draws, what is the probability that the outcome contains green and/or blue marbles only? (Round your answer to four decimal places.)
2. If three marbles are selected at random without replacing between draws, what is the probability that the outcome contains only green marbles? (Round your answer to four decimal places.)
3. If three marbles are selected at random with replacing between draws, what is the probability that the outcome contains no green marbles? (Round your answer to four decimal places.)
The required probability for a number of problems given is as follows, 1.) 1 / 3 2.) 1 / 5, and 3.) 1 / 4.
Here,
A jar consists of 4 red marbles, 5 yellow marbles, 3 green marbles, and 3 blue marbles.
Total number of marbles = 15
1) probability that the outcome contains green and/or blue marbles only,
= 2 / 6 = 1 / 3
2.) probability that the outcome contains only green marbles,
= 3 / 15 = 1 / 5
3.) the probability that the outcome contains no green marbles,
= 3 / 12 = 1 / 4
Thus, the required probability for a number of problems given is as follows, 1.) 1 / 3 2.) 1 / 5, and 3.) 1 / 4.
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