Question

@perl question

Answer 1

one sec

Answer 2

thats mileage for 80 mph, do you see way?

Answer 3

gas mileage for 80 mph = 30 - 3* ( 80 - 55)/5

Answer 4

so the gas mileage for 80 mph is 15 miles per gallon

Answer 5

ok a) and b) are correct

Answer 6

c) x / 30 , x / ( 30 - 3*(x-55)/5 )