Question: In a family there are two cars. The sum of the average miles per gallon obtained by the two cars in a particular week is 75 miles per gallon. The first car has consumed 25 gallons during that week , and the second has consumed 35 gallons , for a total of 2275 miles driven by the two cars combined. What was the average gas mileage obtained by the second car that week?
Answer: 5.5