Answer and Step-by-step explanation:

The domain is all real numbers <u>except</u> 9 (positive)
This is because we can't have 0 in the denominator, and when x equals 9, then the denominator is 0. Anything divided by 0 is undefined, which is why 9 (in this equation) is <u>not</u> included.
#teamtrees #WAP (Water And Plant)
If I understand correctly, you went wrong because you solved for Y instead of M, like the question dictates.
I told u, <span>you just have to add 10 more to that number 12793+10=12800</span>