Question

At the beginning of a journey, the fuel tank of a car was 3/4 full. When the car reached its destination, it had consumed 60% of the gasoline in the tank. The full capacity of the fuel tank is w gallons.

A. Write an algebraic expression for the amount of gasoline left in the fuel tank.
B. If w = 15.5, how much gasoline was left at the end of the journey?

Answer 1

let x be the amount of fuel left in the carw is The full capacity of the fuel tankthe algebraic expression for the amount of gasoline left in the car isx = w(3/4)*( 1 - 0.6)
b. w = 15.5x = w(3/4)*( 1 - 0.6)x = (15.5)(3/4)*( 1 - 0.6)x = 4.5 gallons left at the end of the journey