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aliina [53]
2 years ago
7

A=4pi r^{2} solve for r

Mathematics
1 answer:
lara [203]2 years ago
5 0
             A = 4πr²          Divide both sides by 4π
     A / 4π = r²               Find the square root of both sides
√(A / 4π) = √(r²)          Cancel out the square with the square root
√(A / 4π) = r                Switch the sides to make it easier to read
              r = √(A / 4π)
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1 year ago
Write 3 < x < 9 in interval notation.
lutik1710 [3]

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(3, 9)

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If we have ≤ or ≥, we use brackets to signify it includes the values.

If we have < or >, we use parenthesis to signify it doesn't include the values.

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3 years ago
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kirill [66]
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3 years ago
A student saves $3 dollars on August 1, $5 on August 2, $7 on August 3, and so on. How much will she save in August 20 ?
Delvig [45]
Here is your answer

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$3, &5, $7....

Clearly it forms an AP,

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3 years ago
Read 2 more answers
3x + 4y = 12<br> x + 2y = 10
borishaifa [10]

Answer:

x=-8 and y=9

Step-by-step explanation:

rewrite the equations to x+2y=10,3x+4y=12

sub 2y from both sides x+2y-2y=10-2y

substitue x=10-2y in 3x +4y=12

3(-2y+10)+4y=12

distribute

add-30 to both sides

divide both sides by -2

y=9

sustitute 9 for y in -2y+10=x

x=-8

7 0
3 years ago
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