SOLUTION: suppose z varies jointly with x and y and x varies directly with w. Show that z varies jointly with w and y

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Question 1147018: suppose z varies jointly with x and y and x varies directly with w. Show that z varies jointly with w and y
Answer by josgarithmetic(39626) About Me  (Show Source):
You can put this solution on YOUR website!
z=Cxy, and ,x=Kw, for two constants C and K.

system%28x=z%2F%28Cy%29%2Cx=Kw%29

z%2F%28Cy%29=Kw

z=Cy%2AKw

z=CKyw-----------------to read, z varies jointly as y and w. The variation constant is CK.