4 years ago

Y varies directly as x. If x = 5 when y = 12 find x when y = 30

1 answer:

4 0

Direct Variation. The equation is y=k(x). So 12=k(5), divide by 5 on both sides coming up with k=2.4. Plug 2.4 in as k in the original equation, making it 30=2.4(x), divide both sides by 2.4, 30 divided by 2.4 is 12.5, making x=12.5

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