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December 22, 2014

December 22, 2014

Posted by **Jane** on Friday, December 30, 2011 at 12:09pm.

A chemist has one solution containing 30% insecticide and another solution containing 50% insecticide. How much of each solution should the chemist mix to get 200 L of a 42% insecticide?

- math -
**Damon**, Friday, December 30, 2011 at 1:20pm.3 x + .5 y = .42(x+y)

and

x+y = 200

so y = (200-x)

.3 x + .5 (200-x) = 84

etc

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