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Mathematics, 26.03.2021 05:00 hunterthompson5578

The variable z varies jointly with x and y. Also, z = -75 when x = 3 and y = -5. What equation describes this variation?

x = kyz
y = kxz
z = kxy
k = xyz

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The variable z varies jointly with x and y. Also, z = -75 when x = 3 and y = -5. What equation desc...
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