Answer:
Kareem needs 864 cards more to reach his goal.
Explanation:
Number of cards Kareem has = 216
Number of cards in 1 set = 72
Total number so cards in 15 set = 15 × 72 = 1,080
Number of cards Kareem need to reach his goal =x
![1,080=216+x](https://img.qammunity.org/2021/formulas/mathematics/high-school/t7rirgsa0fcf7cz0purjm78p0r8ltvai73.png)
![x=1,080-216=864](https://img.qammunity.org/2021/formulas/mathematics/high-school/r2psgsy2gcmb0kh6jqhmu7m5bnp8h8yu2o.png)
Kareem needs 864 cards more to reach his goal.