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UkoKoshka [18]
3 years ago
12

What's the circumference of a

Mathematics
1 answer:
den301095 [7]3 years ago
8 0

Answer:

C = 31.4 inches

Step-by-step explanation:

To find the circumference of a circle, the formula is d(pi), or 2r(pi)

We are given the radius, so let's just plug in the number:

2(5)(pi)

So our circumference would be 10pi

We have to get an approximation here, so we would do 10(3.14)

That would be 31.4 inches

I hope this helps, let me know if you have any questions.

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sergeinik [125]
X is 7 more than y
x>y then
difference betwen squares is 161 so


x=7+y
and
x²-y²=161

so
x=7+y
sub that for x in other equation

(7+y)²-y²=161
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14y+49=161
minus 49 both sides
14y=112
divide both sides by 14
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sub back

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