SOLUTION: David drives 168 miles a week for work. He fills his gas tank twice a week. Each fill up is for 12 gallons. Assuming he uses all of the gas each week and only uses the car to trave

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: David drives 168 miles a week for work. He fills his gas tank twice a week. Each fill up is for 12 gallons. Assuming he uses all of the gas each week and only uses the car to trave      Log On

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Question 976030: David drives 168 miles a week for work. He fills his gas tank twice a week. Each fill up is for 12 gallons. Assuming he uses all of the gas each week and only uses the car to travel to and from work, what is the gas mileage of his car? (Gas mileage = miles/gallons)
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
First-reading feels like an extended units conversion exercise. Listing the conversion ratios,

168%28miles%2Fweek%29, FOR WORK
2%28tanks%2Fweek%29
12%28gallons%2Ftank%29

Find fuel efficiency, a value in unit of MILES per GALLON.

168%28miles%2Fweek%29%2A%281%2F2%29%28weeks%2Ftank%29%2A%281%2F12%29%28tanks%2Fgallon%29; and you need to examine how this expression is constructed, very carefully to understand it. Once you do understand, you can take the evaluation the rest of the way.


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7 MILES per GALLON