Valerie replaces one car alternator every 1.75 hours. She takes a 1-hour lunch break. Which equation can be used to determine how many alternators she replaces in 8 hours?

Multiple choice question.
cross out

A)
1.75w−1=8
B)
1.75w+1=8
C)
18w−1=8
D)
18w+1=8

How do i do this activity, is appreciated

Which one ? is the answer and how to find this answer

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?