15. -2
16. A. The pool was originally empty
No they do not. Just by looking at the numbers, you can tell they are clearly different. However, if you had 2 expressions, you can evaluate the expressions. But, since you are clearly able to tell the numbers are not the same thing, we do not need to do that for this problem.
if you need more help, always ask. It wasn't simple, but I believe you can do it.
Answer:
1/4
Step-by-step explanation: