Question

A plumber charges $50 to come to a house and $20 an hour for work time.

If h represents the number of hours worked, which expression gives the total amount the plumber charges?
a.
50h + 20
b.
20h + 50
c.
20(h + 50)
d. + 50

Answer 1

Since the 50 remains the same every time, is has no letters next to it in the equation. The 20, however, is multiplied by the amount of hours, and will therefore have an h next to.

20h + 50- the answer is a.