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Z varies jointly with x and y. x=5 y=2 z=10.witch relates x,y, and z?

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A. z=xy

B. z=1/10xy

C. z=x/y

D. z=10xy

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  1. The general equation for this is:

    z = kxy

    Plug in what they gave you:

    10 = k(5)(2)

    Solve for k:

    10 = 10k

    k = 1

    Plug that back in:

    z = 1xy or z = xy

    A.

    Hope that helps!

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