SOLUTION: A petroleum company has two different sources of crude oil. The first source provides crude oil that is 55% hydrocarbons, and the second one provides crude oil that is 80% hydrocar

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Question 698042: A petroleum company has two different sources of crude oil. The first source provides crude oil that is 55% hydrocarbons, and the second one provides crude oil that is 80% hydrocarbons. In order to obtain 150 gallons of crude oil that is 75% hydrocarbons, how many gallons of crude oil must be used from each of the two sources?
Answer by solver91311(24713) About Me  (Show Source):
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80% of gallons of crude that is 80% hydrocarbons is pure hydrocarbon.

55% of gallons of crude that is 55% hydrocarbons is pure hydrocarbon.

75% of 150 gallons of crude that is 75% hydrocarbons is pure hydrocarbon.

The two pieces have to add up to the whole, so:



Solve for , then calculate

John

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