Question

A car travels 17 miles on one gallon of gas
a)Express y in terms of x if the car uses y gallons to travel x miles.

Answer 1

y=number of gallons of gas consumed by the car traveling x miles
x=number of miles traveled by the car

mpg=number of miles per gallon that the car will go (an important consideration when you're considering which car to buy)

You want y in gallons. You want to eliminate "mpg" and "miles" (x).

Play around with these variables until you obtain an expression for y that has the correct units of measurement (miles).
miles
Again: "mpg" = ----------
gallon

y is measured in gallons
x is measured in miles

Answer 2

How many miles will the car travel on one gallon of gasoline?