#8 you do 360= 112+136+x... then you solve for x. X=112. Now you divide this by two since it is an inscribed angle. For #9 I have this very simplified work in the picture. Sorry I did not do #10
Diagram? There is no diagram given.
a.


Cannot solve b without the diagram.
Answer:
4
Step-by-step explanation:
Answer:
7m
Step-by-step explanation:
-9(-5k + 3m) + 9m - 5(-5m + 9k)
Distribute
45k -27m +9m +25m -45k
Combine like terms
45k -45k -27m+9m+25m
0k + 7m
7m