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26-11-2019
Mathematics

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If y varies directly as x^2 and y = 72 when x =3, what is the value of y when x = 6?

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abioduntolu30 abioduntolu30

26-11-2019

Answer:

288

Step-by-step explanation:

[tex]y \alpha x {}^{2} [/tex]

then

[tex]y = kx {}^{2} [/tex]

72=9k

dividing both side by 9

k=72÷9

=8

[tex]y = 8 {x}^{2} [/tex]

y=8×6²

y=8×36

y=288

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