He didn't do it as rise over run, or y2-y1/x2-x1
He did it reverse, which is incorrect.
Solve it like you would for an equation by isolating the variable h.
First subtract h from both sides.
10+h-h>2+2h-h
10>2+h
Then subtract 2 from both sides.
10-2>2-2+h
8>h
We can then flip 8>h to h<8 just because it's a more standard way of writing it.
Final answer: h<8
Answer: 5 or c
Step-by-step explanation: