30 miles for a single gallon. first we find out how many gallons would be used. number of gallons = 1020/30 gallons = 34. and since 1 gallon costs $4.06 34 gallons would cost = 34 x 4.06 = $138.04
if y = 25 when x = 6 1/4, then when y = 12, that would mean that we divided 25 by 2.0833. So we can do 6 1/4 divided by 2.0833 is the answer which is 3.00004800077.