A book rental shop rented out books and the rate of rental charges are shown in the table.
Number of days |
Rates |
After the first 9 days |
50 cents a day |
After 9 days |
90 cents a day |
Elijah rented 2 books and was charged $25.20. How many days did he rent the books for?
$1 = 100¢
$25.20 = 25.20 x 100 = 2520¢
Amount that Elijah paid for each book
= 2520 ÷ 2
= 1260¢
Amount that Elijah paid for each book for renting for the first 9 days
= 9 x 50
= 450¢
Additional amount that Elijah paid for each book for renting for additional days
= 1260 - 450
= 810¢
Number of additional days that Elijah rented for each book
= 810 ÷ 90
= 9
Total number of days that Elijah rented the books
= 9 + 9
= 18
Answer(s): 18