Plz help I have this and i am being timed

Answer:

Hi! The answer would be A.

Step-by-step explanation:

8 less than shows us that the number 8 will be subtracted from another number. Not the one being subtracted from. So then we know it's not C.

The quotient of 5 and a number shows us that 5 will be the numerator and the 'number' will be the denomintor.

That means the answer will be 5n-8.

Hope this helps! :)

Btw I also took the K12 quiz just now.

The expression that can be used to represent the phrase is 5 / n - 8

The term less means to subtract. For example,  8 less 2 means 2 subtracted from 8. This is the same as 8 - 2 = 6

The term quotient means division. It means to divide a number by another number. For example, the quotient of 8 and 2 means 8 to divide by 2. This is the same as 8 /2 = 4

From this question, let n represent the number, the information given in this question can be represented with this expression:

the quotient of 5 and a number can be expressed as 5 / n

8 less than the value of the quotient is 5/n - 8

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Answer:

The alternative hypothesis is \(H_1: p > 0.6\).

The critical value is \(Z_c = 1.645\)

Step-by-step explanation:

It is claimed that proportion in favor of proportion A is greater than 60%.

This means that at the null hypothesis, we test if the proportion is of at most 60%, that is:

\(H_0: p \leq 0.6\)

At the alternative hypothesis, we test if the proportion is more than 60%, that is:

\(H_1: p > 0.6\)

What is (are) the critical value?

The critical value is the value of Z with a p-value 1 subtracted by the standard significance level of 0.05, since we are testing if the mean is more than a value, so, looking at the z-table, \(Z_c = 1.645\)

The total volume of the air space of spherical ball is A = 12.265625 inches³

Given data ,

Since each tennis ball has a diameter of 2.5 inches, the radius of each ball is 1.25 inches.

The air space around the balls can be thought of as a cylinder with a height equal to the diameter of one ball and a radius equal to the radius of one ball.

The height of the cylinder is 2.5 inches, and the radius is 1.25 inches.

The formula for the volume of a cylinder is:

V = πr²h

V = ( 3.14 ) ( 1.25 )² ( 7.5 )

V = 36.796875 inches³

where V is the volume, r is the radius, and h is the height.

So, the volume of the one ball is:

V₁ = ( 4/3 )π(1.25)³

V₁ = 8.177083 inches³

The total volume of three balls is = volume of 3 spherical balls

V₂ = 3V₁ = 3(8.177083) ≈ 24.53125 cubic inches

Therefore, the total volume of the air space around the three tennis balls is approximately A = 36.796875 inches³ - 24.53125 inches³

A = 12.265625 inches³

Hence , the volume of air space is A = 12.265625 inches³

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Answer:

17/3

Step-by-step explanation:

all you have to do is add 5 and 2 and you get 17 / 3  also divide by 2

Answer:

$51.93

Step-by-step explanation:

$48.99 x 1.06 = $51.9294

Answer: 146

Step-by-step explanation: Divide 7300 by 50

Answer:

b = 1460

Step-by-step explanation:

50b = 7,300

the steps are easy and simple- Divide 50 on each side

50b/50 = 7300/50

this will isolate b and give it's answer

b = 1460

Answer: Its 48in

Step-by-step explanation:

Love you all. And good luck.

Answer:

7/2

Step-by-step explanation:

To find the reciprocal of a fraction we just flip it

2/7 =7/2

The reciprocal of 2/7 is 7/2, and it plays a significant role in various mathematical operations involving fractions.

The reciprocal of a fraction is obtained by interchanging the numerator and denominator. For the fraction 2/7, its reciprocal is 7/2. To understand why this is the case, let's break it down.

When we take the reciprocal of a fraction, we essentially flip it upside down. In the case of 2/7, we switch the positions of 2 (numerator) and 7 (denominator) to get 7/2. This reciprocal property holds true for any fraction.

The reciprocal of 2/7 is an essential concept in mathematics, especially when dealing with division of fractions. When you divide a fraction by another fraction, it is equivalent to multiplying the first fraction by the reciprocal of the second fraction. So, dividing by 2/7 is the same as multiplying by 7/2.

In conclusion, the reciprocal of 2/7 is 7/2, and it plays a significant role in various mathematical operations involving fractions.

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Step-by-step explanation:

28<18-5(-3)= 28<33 T

28<18-5(-2)= 28<28 F

28<18-5(-1)= 28< 23 F

28<18-5(0)= 28<18 F

28<18-5(2)= 28<8 F

-3(14)/-51<1 =0.82<1 T

-3(15)/-51<1=0.88<1 T

-3(17)/-51<1=1<1 F

-3(18)/-51<1= 1.1<1 F

-3(19)/-51<1=1.1<1 F

-3,14,15

Answer: A

Step-by-step explanation:

Answer:

1/3 of 60 = 20

2/5 x 3 = 1 1/5

A: 1 1/5 cans of paint

Step-by-step explanation:

The income I from the train in terms of the ticket price p is given by the expression:

I = -0.08x² + 30x + 800p

Let's start by defining some variables:

x: the number of 4 cents increases in the fare

p: the original ticket price in dollars

q: the new ticket price after x increases of 4 cents

From the problem, we know that for each 4 cents increase in the fare, 2 fewer people will ride the train. This can be expressed mathematically as:

number of passengers = 800 - 2x

We also know that the fare is increased by 4 cents for each 4 cents increase in the ticket price. Therefore, the new ticket price q can be expressed as:

q = p + 0.04x

Finally, we need to express the income I from the train in terms of the ticket price p. This can be done by multiplying the number of passengers by the ticket price:

I = p * (800 - 2x)

Substituting q into the equation for I, we get:

I = (p + 0.04x) * (800 - 2x)

Expanding the brackets, we get:

I = 800p - 2px + 32x - 0.08x²

Simplifying this expression, we get:

I = -0.08x² + 30x + 800p

Therefore, the income I from the train in terms of the ticket price p is given by the equation:

I = -0.08x² + 30x + 800p

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Step-by-step explanation:

The surface area of a cylinder is given by

\(A = 2\pi r^2 + 2\pi rL\)

\(\:\:\:\:=2\pi(3\:\text{cm})^2 + 2\pi(3\:\text{cm})(12\:\text{cm})\)

\(\:\:\:\:= 282.7\:\text{cm}^2\)

Answer:

4

Step-by-step explanation:

if you have 2 apples and you get 2 more apples how many do you have.

Answer:

y=2x+6

Step-by-step explanation:

Answer:

247.4

Step-by-step explanation:

- you can either use pi*diameter or 2pi*radius

- \(\pi (78.75) = 247.4\)

Answer:

37

Step-by-step explanation:

The reflection of the point (–4, 6) across both axes is (b) (4, -6)

From the question, we have the following parameters that can be used in our computation:

Point = (-4, 6)

The rule of reflections across both axes is

(x, y) = (-x, -y)

Using the above as a guide, we have the following:

Image = (4, -6)

Hence, the reflection of the point (–4, 6) across both axes is (b) (4, -6)

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The percent change is -25% that is decreased.

What is percent change ?

A percentage is a portion of a whole expressed as a number between 0 and 100 rather than as a fraction. All of something is 100 percent , half of it is 50 percent , none of something is 0 percent.

Percent change equals the change in value divided by absolute value of original value and multiplied by 100.

Negative precent change :

When the change goes on decreasing, i.e. final value is less than original.

Positive percent change :

When the change goes on increasing i.e. final value is more than original.

In given que,

initial value = 8

final value = 6

change in value = 6-8

                           = -2

So, percent change = -2/8 *100 = -25%

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9514 1404 393

Answer:

  0.6

Step-by-step explanation:

The instantaneous rate of change at any point on a curve is the slope of the tangent line at that point.

At x=1, the tangent line is given as ...

  y = 0.6x +0.9

The slope of that line is the coefficient of x, 0.6.

The instantaneous rate of change of f(x) at x=1 is 0.6.

Answer: d i think im pretty sure

Step-by-step explanation:

Step-by-step explanation:

To solve the equation 5x^2 = 65 for x, we can start by dividing both sides by 5:

5x^2/5 = 65/5

Simplifying:

x^2 = 13

To isolate x, we can take the square root of both sides:

sqrt(x^2) = sqrt(13)

Note that the square root of x^2 is |x| (the absolute value of x), since x^2 is always positive. So:

|x| = sqrt(13)

Therefore, x can be either the positive or negative square root of 13:

x = +/- sqrt(13)

Rounding to three decimal places:

x ≈ +/- 3.606

The value of c in the polynomial is - 7.

The polynomial is given as follows:

p(x) = 2x³ - x² +  cx + 2 . The value of c if x - 2 is a factor of p(x) can be computed as follows:

Therefore,

p(x) = 2x³ - x² +  cx + 2

when x - 2 is a factor, p(x) = 0

Therefore,

0 = 2x³ - x² +  cx + 2

Hence,

2(2)³ - (2)² +  2c + 2 = 0

16 - 4 + 2c + 2 = 0

12 + 2 + 2c  = 0

2c = - 14

divide both sides by 2

c = - 14 / 2

c = - 7

Therefore,

c = -7

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In the given function H(p) = p/5 + 15, the independent variable is "p" ,

The independent variable in this function is denoted by "p." The independent variable can also be referred to as the input variable, which means that it is the value that is inputted into the function to produce an output. In this specific function, "p" represents the price of a good or service.

It is important to distinguish between the independent and dependent variables in a function. The dependent variable is denoted by "H(p)" in this case, and it is the output of the function. The value of the dependent variable is determined by the independent variable. In this function, "H(p)" represents the total cost of the good or service, which is dependent on the price "p." p is the input variable representing the price of the good or service.

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Answer:

The sequence is increasing by 5 at each step. So, we can write:

a1 = 30

a2 = 30 + 5 = 35

a3 = 30 + 25 = 40

a4 = 30 + 35 = 45

a5 = 30 + 4*5 = 50

We notice that the nth term is given by:

an = 30 + (n-1)5

So, the explicit formula for the nth term is:

an = 25n + 5

Answer:

i added the graph below :) hope this helps hun <3

Step-by-step explanation:

There are 4 cups of brown sugar are required for every 12 cups of white sugar.

A recipe calls for 2 cups of brown sugar for every 6 cups of white sugar. We can set up a proportion to find the relationship between the two quantities:

2 cups brown sugar / 6 cups white sugar = x cups brown sugar / 12 cups white sugar

To find the number of cups of brown sugar required for 12 cups of white sugar, we can cross-multiply and then solve for x:

2 cups brown sugar × 12 cups white sugar = 6 cups white sugar × x cups brown sugar

24 cups brown sugar = 6x cups brown sugar

x = 24/6

x = 4

So, 4 cups of brown sugar are required for every 12 cups of white sugar.

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Through reporting statistical results, we found that  \(r^{2}\) is 0.22 and Cohen's \(d\) is 0.52 when s = 8, and  \(r^{2}\) is 0.04 and Cohen's \(d\) is 0.21 when s = 20. It is also observed that when the variability of the scores in the sample, \(r^{2}\) decreases, there is simultaneous decrease in the measures of effect size, Cohen's \(d\) as well.

It is given to us that -

A random sample of n = 16 scores

Population with a mean of μ = 45

Sample mean is found to be M = 49.2

In Reporting Statistical results, there are two different effect sizes, namely eta-squared \(r^{2}\) and Cohen's \(d\).

Eta-square, \(r^{2} = \frac{t^{2} }{t^{2}+df }\)

where, \(df = n-1\)

\(SEM = \frac{s}{\sqrt{n} }\)

and, \(t=\frac{x_{2} -x_{1} }{SEM}\)

Cohen's \(d=\frac{x_{2} -x_{1} }{s}\)

a) Given that the sample standard deviation is s=8

We have n = 16

So, \(df = n-1 = 16-1 = 15\)

\(SEM = \frac{s}{\sqrt{n} } = \frac{8}{\sqrt{16} } = \frac{8}{4} = 2\)

We also have μ = 45 and M = 49.2. This implies

\(t=\frac{x_{2} -x_{1} }{SEM} = \frac{49.2-45}{2} = \frac{4.2}{2} =2.1\)

Now,

\(r^{2} = \frac{t^{2} }{t^{2}+df } = \frac{(2.1)^{2} }{(2.1)^{2}+ 15 }= \frac{4.41}{4.41+15} \\= \frac{4.41}{19.41} = 0.22\)

Cohen's \(d=\frac{x_{2} -x_{1} }{s} = \frac{49.2-45}{8} = \frac{4.2}{8} = 0.52\)

b) Given that the sample standard deviation is s=20

We have n = 16

So, \(df = n-1 = 16-1 = 15\)

\(SEM = \frac{s}{\sqrt{n} } = \frac{20}{\sqrt{16} } = \frac{20}{4} = 5\)

We also have μ = 45 and M = 49.2. This implies

\(t=\frac{x_{2} -x_{1} }{SEM} = \frac{49.2-45}{5} = \frac{4.2}{5} =0.84\)

Now,

\(r^{2} = \frac{t^{2} }{t^{2}+df } = \frac{(0.84)^{2} }{(0.84)^{2}+ 15 }= \frac{0.706}{0.706+15} \\= \frac{0.706}{15.706} = 0.04\)

Cohen's \(d=\frac{x_{2} -x_{1} }{s} = \frac{49.2-45}{20} = \frac{4.2}{20} = 0.21\)

c) Comparing a and b, we see that the variability of the scores in the sample, \(r^{2}\) is 0.22 when s = 8 and \(r^{2}\) is 0.04 when s = 20. Similarly, Cohen's \(d\) is 0.52 when s = 8 and \(d\) is 0.21 when s = 20.

Thus, we can see that when the variability of the scores in the sample, \(r^{2}\) decreases, there is simultaneous decrease in the measures of effect size, Cohen's \(d\) as well.

Therefore, through reporting statistical results, we found that  \(r^{2}\) is 0.22 and Cohen's \(d\) is 0.52 when s = 8, and  \(r^{2}\) is 0.04 and Cohen's \(d\) is 0.21 when s = 20. It is also observed that when the variability of the scores in the sample, \(r^{2}\) decreases, there is simultaneous decrease in the measures of effect size, Cohen's \(d\) as well.

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Answer:

\((-5)^3 * c^3\)

Step-by-step explanation:

Given

\((-5)(-5)(-5) * c * c * c\)

Required

The exponent form

We have:

\((-5)(-5)(-5) * c * c * c\)

Apply the following law of indices;

\(x * x * x ...... = x^n\)

So, the expression becomes:

\((-5)^3 * c^3\)

Answer:

its c

Step-by-step explanation:

Did it on edge

a) In April, the number of students who had not passed their driving test decreased by 5%.

b) The equation is 1.2x + 0.95(1000 - x) = 1000.

c) 200 students passed their driving test in January.

a) At the beginning, of January, x students had passed their driving test, then the remaining number of students who had not passed their driving test was (1000 - x).

In April, the number of students who had not passed their driving test decreased by 5%, which means the remaining number of students who had not passed their driving test is 0.95 times the original number (1000 - x).

b)

The number of students who had passed their driving test increased by 20%, which means the new number of students who passed their driving test is 1.2 times the original number (x).

The number of students who had not passed their driving test decreased by 5%, which means the new number of students who had not passed their driving test is 0.95 times the original number (1000 - x).

Therefore, we can write the equation 1.2x + 0.95(1000 - x) = 1000.

c) We can solve for x in the equation 1.2x + 0.95(1000 - x) = 1000.

Expanding the equation, we get:

1.2x + 950 - 0.95x = 1000

0.25x = 50

x = 200

Therefore, 200 students passed their driving test in January.

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