Asked by Lakshmi
how many 0z of a metal containing 90% copper must be combined with 3 0z of purecopper to form an alloy containing 92% copper?
Answers
Answered by
MathMate
It's almost the same as the silt/soil problem.
Let x be the volume of metal in oz needed, then
(0.9x+3)/(x+3)=0.92
Solve for x.
Do not forget to distribute when you cross multiply.
Let x be the volume of metal in oz needed, then
(0.9x+3)/(x+3)=0.92
Solve for x.
Do not forget to distribute when you cross multiply.
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