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Suppose that y varies directly with x and inversely with z, and y = 4 when x = 8 and z = 14. Find z when x = 36 and y = 6. First, what is the equation of variation? y =

What is the value of k?

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  1. 9 July, 15:52
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    Y=kx/z is the equation of variation.

    4=8k/14, so k=4*14/8=7. Therefore k=7. So y=7x/z. When x=36 and y=6, 6=252/z, z=252/6=42.
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