The function f (x) = 7x+15 models the time in minutes that a customer will wait to get an oil change if there are x cars in line ahead of the customer. How long will a customer wait if they are fifth car in the line? 28 minutes 35 minutes 43 minutes 50 minutes

43 minutes.

Step-by-step explanation:

f (x) is the time in minutes that a customer will wait when x cars are ahead of the customer.

If a customer is 5th in the line, it means there are 4 cars ahead of that customer.

So, the time that customer waits is equal to f (4)

f (4) = 7 * 4 + 15

f (4) = 28 + 15

f (4) = 43 minutes