chandislilly chandislilly

20-01-2015
Mathematics

Answered

PLEASE HELP
Variable y varies directly with x2, and y = 72 when x = 6.

What is the value of y when x = 4?

y =

Answer :

20-01-2015

Y= k x 2x so when x=6 and y=72, we find k= 6 so when x=4 we get (12) x 2(4) and find y=96 :)

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