Homework Help: Algebra

Posted by Matthew on Monday, October 22, 2012 at 11:20am.

A petroleum company has two different sources of crude oil. The first source provides crude oil that is 35% hydrocarbons, and the second one provides crude oil that is 60% hydrocarbons. In order to obtain 120 gallons of crude oil that is 55% hydrocarbons, how many gallons of crude oil must be used from each of the two sources?

Algebra - Steve, Monday, October 22, 2012 at 11:22am
work with the amount of hydrocarbons present in each part:

.35x + .6(120-x) = .55*120
x = 24

so, 24 gals of 35%, and 96 gals of 60%

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