Question

gas mileage is the number of miles you can drive on a gallon of gasoline a test of a new car results in 390 miles on 20 gallons of gas how far could you drive on 40 gallons of gas what is the car gas mile age​

Answer 1

The answer to this equation is 780.

Explanation:

If I understood the question correctly then all you have to do to solve this is add 390+390=780