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frez [133]
4 years ago
7

4b + 21 = −3(b − 7) + 7b

Mathematics
1 answer:
Lana71 [14]4 years ago
6 0
4b+21=-3b+21+7b
4b+21=4b+21
it means that the expression shows an identity
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If the great circle circumference of a sphere is 16pie yards, find its surface area
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Answer:

Step-by-step explanation:

The circumference of a circle = 2*pi * r

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Divide both sides by pi

8 * pi / pi = pi * r / pi

r = 8

====================

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