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September 22, 2014

September 22, 2014

Posted by **daniela** on Wednesday, October 29, 2008 at 7:27pm.

- math -
**drwls**, Wednesday, October 29, 2008 at 8:55pmTheir trip takes 30 hours. If they average 40 mph, the trip length is 1200 miles.

Let X be the cost of a gallon of gas.

165.00 = [(1200/30) + (1200/20)]*X

= (40 + 60 gallons)* X ($/gallon)

Solve for X

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