Find the 9th term in the following arithmetic sequence :
17, 13, 9, 5, ..
Hint: Write a formula to help you.
1st term + common difference (desired term – 1)
[?]+[ ][ - 1)
Enter the number that belongs in the green hoy

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?