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Anika [276]
3 years ago
6

If the area of a circle measures 25π cm2, what is the circumference of the circle in terms of π? A) 5π cm B) 10π cm C) 50π cm D)

100π cm
Mathematics
2 answers:
Bad White [126]3 years ago
8 0

the answer to the question is a.) 5rr cm because 5rr is right on brainly i've had it


Sliva [168]3 years ago
6 0
<h2><em><u>Answer:</u></em></h2><h2><em><u>The correct answer is B) 10 pi cm</u></em></h2><h2><em><u>Step-by-step explanation:</u></em></h2><h2><em><u>10π cm </u></em></h2><h2><em><u /></em></h2><h2><em><u>A = πr2 </u></em></h2><h2><em><u>25π = πr2 </u></em></h2><h2><em><u>25 = r2 </u></em></h2><h2><em><u>5 = r </u></em></h2><h2><em><u /></em></h2><h2><em><u>C = 2πr </u></em></h2><h2><em><u>C = 2π(5) </u></em></h2><h2><em><u>C = 10π</u></em></h2>
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1) A rectangle has the lengths shown <br> Find the perimeter of the rectangle.
maks197457 [2]

Hi there! :)

\large\boxed{P = 32cm}

Find the perimeter by solving for y.

We know that a rectangle contains two pairs of parallel and congruent sides, therefore:

5y - 1 = 2y + 8

We can solve for y using this expression. Begin by subtracting 2y from both sides:

5y - 2y - 1 = 2y - 2y + 8

3y - 1 = 8

Add 1 to both sides:

3y - 1 + 1 = 8 + 1

3y = 9

Divide both sides by 3:

y = 3

Recall that the perimeter of a rectangle is:

P = 2l + 2w

Plug in the given expressions for the side lengths to find one equation:

P = 2(5y - 1) + 2(y - 1)

Simplify by distribution:

P = 10y - 2 + 2y - 2

Combine like terms:

P = 12y - 4

Plug in the solved value of y into this equation:

P = 12(3) - 4

P = 36 - 4

P = 32 cm.

3 0
2 years ago
In the algebraic expression 7/y, what is the coefficient of y? Explain
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7/y....the coefficient of y is 1

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3 0
3 years ago
Pls help someone pls help
AlexFokin [52]

Answer:

The answer is d.

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4 0
2 years ago
Nia answered 80% of the 40 questions on a test correctly. How many correct answers did she have?
Step2247 [10]

Nia answered correct answers = 80% of the 40 questions

When we remove % sign from a number, we divide that number by 100

= \frac{80}{100} of 40

=\frac{80}{100} \times 40

Cancelling the two zeroes from numerator and denominator,

= 8 \times 4

= 32.

Total correct answers answered by Nia = 32

3 0
3 years ago
Read 2 more answers
Marlina received her salary on Friday. She spent one-half of her salary on rent and then spent $338 on her electric and water bi
Alenkinab [10]

Answer:

$654

Step-by-step explanation:

Let the amount of money Marlina's received for her salary be x.

We know that she spent 1/2 of her salary on rent and then $338 on her electric and water bill. So, after this, she will have:

x-\frac{1}{2}x-338

Left of her salary.

Next, she spent one half of what was left. So, it will be one-half of the equation. Therefore, she will have spent:

x-\frac{1}{2}x-338-\frac{1}{2}(x-\frac{1}{2}x-338)

Finally, she spent $56 for gas. So, we will subtract 56:

x-\frac{1}{2}x-338-\frac{1}{2}(x-\frac{1}{2}x-338)-56

And we know that after all of the expenses, she will have $102 left. Therefore:

x-\frac{1}{2}x-338-\frac{1}{2}(x-\frac{1}{2}x-338)-56=102

We want to know how much Marlina spent on rent. So, let's find her salary x first.

First, let's distribute the 1/2:

x-\frac{1}{2}x-338-\frac{1}{2}x+\frac{1}{4}x+169-56=102

Combine like terms:

(x-\frac{1}{2}x-\frac{1}{2}x+\frac{1}{4}x)+(-338+169-56)=102

Evaluate:

\frac{1}{4}x-225=102

Add 225 to both sides:

\frac{1}{4}x=327

Multiply both sides by 4:

x=\$ 1308

Therefore, Marlina received a total of $1308 for her salary.

We know that she spent half of her salary on rent. Therefore, the amount she spent on rent is:

r=\frac{1}{2}(1308)=\$ 654

And we're done!

7 0
3 years ago
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