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If z varies jointly as x and y, and z = 288 when x =4 and y = 9. Find y if z = 720 and x = 9.
If z = 720 and x = 9, then y =
(Simplify your answer.)

If z varies jointly as x and y and z 288 when x 4 and y 9 Find y if z 720 and x 9 If z 720 and x 9 then y Simplify your answer class=

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Answer:

z = kxy

288 = k(4)(9)

36k = 288

k = 8

720 = 8(9)(y)

72y = 720

y = 10

10 goes into the box.

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