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