Answer:the two different ways that the total charges can be represented are
79 + 69x
79 + 84x
Explanation:
Let x represent the number of hours that the Plumber is hired by the customer.
A plumber charges a customer a one time service fee of $79, then $69 per hour for labor and a surcharge of $15 per hour due to the call being an emergency. This means that
1) if the call was not an emergency, there would be no surcharge. Therefore, the total charge for x hours would be
79 + 69x
2) if the call was an emergency, there would be surcharge. Therefore, the total charge for x hours would be
79 + 69x + 15x
= 79 + 84x