How do you multiply a 2 digit number by a 2 digit number

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 value of x in the diagram below?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7