Answer:
5: A
6:C
7: No solution, the lines are parallel
8 part 1: A
8 part 2: D
and then I can't really read the rest of 9 but can tell you that B is true
Explanation:
I'll assume that you need help with all of it and I don't know what the elimination method is so I just used desmos if you need me to explain it leave a comment