Question

Bob's Plumbing charges $50 for a house call
(regardless of how much time it takes). Once they
are there they charge $30 an hour (x). The total cost
is a function of the number of hours they work.
Write a function rule that models the cost of the t-
shirts. Evaluate the function for 8 hours.

Functions rule:
Cost for 8 hours:

(i don’t know why it says t-shirts, that’s how it is on my math paper)

Answer 1

Answer:

C(8) = $290

Step-by-step explanation:

Since Bob's Plumbing charge a flat fee of $50, then it is the y-intercept.

As detailed in the given problem, x is the number of hours they work.  

They charge $30 for every x number of hours on the job. This represents the slope.

C(x) represents the total cost of working for x number of hours.

Given these factors, we can establish the following function rule:

C(x) = 30x + 50

To evaluate the function for 8 hours of work:

C(8) = 30(8) + 50

C(8) = 240 + 50

C(8) = 290

Therefore, the cost of working for 8 hours is $290.

Please mark my answers as the Brainliest if my explanations were helpful :)