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3 years ago

A=pi r^2 which if the following equations can be used to solve for the radius (r)

Mathematics

1 answer:

zhannawk [14.2K]3 years ago

4 0

C. You would first have to divide A by Pi, then take the square root of r, in order to get r by itself.

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Simplify {n - 1 - [n - 1 - (n - 1)]}.

artcher [175]

Don't forget the invisble negative ones to distriute
do inside to outside

{n-1-1[n-1-1(n-1)]}
do inside
{n-1-1[n-1-n+1]}
simplify inner parenthasees
{n-1-1[n-n+1-1]}
{n-1-1[0]}
multply
{n-1-0}
add
n-1-0=n-1

it is n-1 simplified

4 0

4 years ago

Read 2 more answers

Plz answer asap and i would be very grateful

goldfiish [28.3K]

The answer is C.

hope this helps

8 0

3 years ago

The table below shows the number of pages Ilana read during summer vacation. Is the relationship between the number of pages and

Vikki [24]

The correct option is D, The relationship is not proportional because the ratio of pages to days is not constant.

<h3>What is a linear relationship?</h3>

A linear relationship is a relationship in which each term has at max one degree. Linear equation in variable x and y can be written in the form y = mx + c.

A linear relationship with two variables, when graphed on the cartesian plane with axes of those variables, gives a straight line.

For the given relationship to be proportional, the number of pages read should be the same every day. Therefore, the ratio of the number of pages to the number of days should be equal.

85/1 = 85

170/2 = 85

249/3 = 83

340/4 = 85

435/5 = 87

Hence, the correct option is D, The relationship is not proportional because the ratio of pages to days is not constant.

Learn more about Linear relationships:

brainly.com/question/27465710

#SPJ1

5 0

2 years ago

A picture measuring 2.5" high by 6" wide is to be enlarged so that the width is now 18 inches. How tall will the picture be?

Usimov [2.4K]

7.5" if the width is now 18 that means its value increased by 3 so multiply 2.5 by 3 and its = to 7.5

6 0

3 years ago

Read 2 more answers

PROBLEM: (IF YOU TROLL I WILL REPORT) Riley has a rectangular shaped patio that is 13 feet long by 15 feet wide. He wants to DOU

rusak2 [61]

Answer:

Part A)

$390=(15+x)(13+x)$

Part B)

Approximately 18.77 feet long by 20.77 feet wide.

Step-by-step explanation:

Currently, the patio is 13 feet long by 15 feet wide. Therefore, the area right now is:

$A=13(15)=195\text{ feet}^2$

We will increase the length and width of the patio by the same amount such that the new area is double the previous amount.

Part 1)

The previous area is 195. Therefore, we would like to the new area to be twice of that. Hence, the new area is:

$A=2(195)=390$

We will increase the length and the width by the same amount. Let’s call this amount x. Then by the area formula (A=bh), we can write:

$390=(15+x)(13+x)$

390 represents the doubled area. (15+x) is the width after the increase x, and (13+x) is the length after the same x increment.

Part 2)

So, we will solve for x. First, expand:

$390=195+15x+13x+x^2$

Simplify:

$x^2+28x+195=390$

Subtract 390 from both sides:

$x^2+28x-195=0$

This is a quadratic. Hence, we can use the quadratic formula:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Our a=1, b=28, and c=-195. Hence:

$x=\frac{-28\pm\sqrt{(28)^2-4(1)(-195)}}{2(1)}$

Evaluate:

$x=\frac{-28\pm\sqrt{1564}}{2}$

Simplify the square root:

$\sqrt{1564}=\sqrt{4}\cdot\sqrt{391}=2\sqrt{391}$

Hence:

$x=\frac{-28\pm2\sqrt{391}}{2}\\$

Simplify:

$x=-14+\sqrt{391} \text{ or } -14-\sqrt{391}$

Approximate:

$x\approx5.77\text{ or } x\approx-33.77$

In this case, we can reject the negative solution.

Hence, the value of x is 5.77.

This means that we should increase the our length and width by 5.77.

Hence, the new length will be 13+5.77 or about 18.77.

And our new width will be 15+5.77 or about 20.77.

So, the new dimensions is approximately 18.77 by 20.77

5 0

3 years ago