Mathematics, 11.12.2019 10:31 michibabiee

The variable z varies jointly with x and y. if z = 18 when x = 2 and y = 6, find the constant of variation, k, and then find the value of z when x = −4 and y = 5.

the constant of variation k is
the value of z is

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The variable z varies jointly with x and y. if z = 18 when x = 2 and y = 6, find the constant of var...

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