Answer:
840, 14
Explanation:
(a.) In order to solve a, we first need to solve b since we're essentially dealing with proportions.
(b.) Our proportion to solve for miles per gallon is 350 miles / 25 gallons = x miles / 1 gallon where we solve for x:

Thus, the gas mileage is 14 miles per gallon
(a.) Now, we can solve for part a. using the proportion x miles / 60 gallons = 14 miles / 1 gallon:
