QuestionEspañol
A plumber charges a flat fee of $\$ 75$ to visit a home and examine a clogged drain. The plumber charges an additional $\$ 22$ per hour spent fixing the drain. The total cost, $C$ (in dollars), for fixing a drain that takes $h$ hours is given by the following. $$C=75+22 h$$
Answer the following questions. (a) What is the total cost for fixing a drain that takes 7 hours? $\square$ (b) If the plumber charged a total of $\$ 317$, how many hours did he spend fixing the drain? $\square$ hours