Answer: It's A
Step-by-step explanation: X + Y is the total books, which should equal 8. Some books treat them as X, while the rest treat them as Y. You end up with 12x+18y=108.
Answer:24
Step-by-step explanation:
2 to the power of 5 = 32
7 to the power of 3 is 343
32-343= -311
The answer is -311. Hope this helps!