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Mathematics, 29.06.2019 23:00 noreenhussain

The variable z varies jointly with x and y. also, z = -75 when x = 3 and y = -5. what equation describes this variation? what is the constant of variation? k =

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The variable z varies jointly with x and y. also, z = -75 when x = 3 and y = -5. what equation descr...

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