Question

A petroleum company has two different sources of crude oil. The first source provides crude oil that is 30% hydrocarbons, and the second one provides crude oil that is 70% hydrocarbons. In order to obtain 180 gallons of crude oil that is 60% hydrocarbons, how many gallons of crude oil must be used from each of the two sources?

first source: _ gallons

second source: _ gallons

Answer 1

another copy and paste fail

Answer 2

The first source provides crude oil that is ????? hydrocarbons,

Answer 3

I fixed it.

Answer 4

put \(x\) as the amount of 30% crude, then since the total is 180 the amount of 70% crude is \(180-x\)
\[.3x+.7(180-x)=.6\times 180\] solve for \(x\)

Answer 5

probably easier to get rid of annoying decimals and solve
\[3x+7(180-x)=6\times 180\]

Answer 6

thank you(:

Answer 7

yw

Answer 8

give me a min to think lol