SOLUTION: If z varies directly as x and inversely as y, find the percentage change in z if x increases by 20% and y increases by 25%.
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-> SOLUTION: If z varies directly as x and inversely as y, find the percentage change in z if x increases by 20% and y increases by 25%.
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Question 1047393: If z varies directly as x and inversely as y, find the percentage change in z if x increases by 20% and y increases by 25%. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=x/y
z (new)=1.2x/1.25 y
The second is divided by the first, and the variables cancel.
The ratio is 1.2/1.25=0.96
The per cent change is minus 4%.
