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2 years ago

13

What is four-fifths of twenty?

2 answers:

Ksivusya [100]2 years ago

3 0

The is answer is sixteen.

Yakvenalex [24]2 years ago

3 0

The answer is 16.
(4/5)(20)= 80/5 = 16

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Nezavi [6.7K]

A) x^2 + y^2 = 80
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What is x^2 -y^2?
B) x * y = 12
So y = 12 / x
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x^2 + (12/x)^2 = 80
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Multiplying each side by x^2
x^4 + 144 = 80x^2
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