Find two fractions whose quotient is 1/20

Acable car begins its trip by moving up a hill. as it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet. then, as the car moves down to the hill’s base, its elevation drops at the same rate.

What is the lcm of 16 and 40 ? 24 and 40 ?

What’s 8y+48 and factor each expression completely