SOLUTION: Please help find an equation of variation where y varies jointly as x and the square of z and where y=70 when x=55 and z=2

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Question 684929: Please help find an equation of variation where y varies jointly as x and the square of z and where y=70 when x=55 and z=2
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
y = kxz^2
...
70 = k*55*2^2
70 = k*220
k = 70%2F220+=+7%2F22
...
highlight_green%28y=%287%2F22%29xz%5E2%29
.....................
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