SOLUTION: z varies directly as x squared x2. If z equals=18 when x equals=3, find z when x equals=4.

SOLUTION: z varies directly as x squared x2. If z equals=18 when x equals=3, find z when x equals=4.

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Question 1061754: z varies directly as x squared x2. If z equals=18 when x equals=3, find z when x equals=4.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=kx^2
find k first
18=k*9
k=2
now use k
z=2x^2
z=2*4^2=2*16=32

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