For the brownie one it’s C
For the train one it’s B
For the flour one it’s C
Answer:

Step-by-step explanation:
I am assuming that you mean (4,−9) and (8, -3).

Hope this helps.
Yes it would be the opposite for example -12 it would be 12 and then 13 would stay 13
Answer:
185 + h
Step-by-step explanation:
Question: What is the sum of 185 and h?
Sum means the answer to an addition problem, so we need to add.
185 + h
This expression can not be simplified any further, so 185 + h is your answer.
Hope this helps :)