Question

Carly belongs to a book-of-the month club. She paid $10 to sign up and then pays S5 for a new book each month. Write an expression for the cost of belonging to the book club for n months. Then find the cost of belonging to the club for 8 months.​

A) 5n+10
B) 10n+5
C) n+15
D) 15n

Answer 1

The expression for the cost of belonging to the book club for n months is 5n + 10. The cost of belonging to the club for 8 months is $50.

Step-by-step explanation:

The expression for the cost of belonging to the book club for n months is given by 5n + 10. This is because Carly pays $5 for each new book each month, so the total cost for n months would be 5n. Additionally, Carly paid $10 to sign up for the club initially, so we add 10 to the expression.

To find the cost of belonging to the club for 8 months, we substitute n with 8 in the expression.

When n = 8, the cost is 5(8) + 10 = 40 + 10 = 50. Therefore, the cost of belonging to the club for 8 months is $50.