On your family trip, you used 14 gallons of gas.

If the odometer readings before and after your trip were 84,679 and 84,947, respectively, how many miles per gallon did you average?

Round your answer to the nearest whole number.

19

Step-by-step explanation:

To get the total miles you drove first, you need to do 84947 (number after the trip) - 84679 (the number before it. You get 268.

Next you need to find out how many miles per gallon. 268/14 which will equal to 19.142, which you can round to 19.