Question

Please help, I know im not supposed to put more then one question in here but im out of points and this is due in less than an hour! D:
Sorry for the troubles, and thanks in advanced!

PS: theres 3 questions, could you just do something like
1: A, 2: B, 3: C,


Thanks xx

Answer 1

1 - c
2 - b Reason - 78-6=72    72/9=8
3 - 18y-100=-190
18y=90
y=4.4444

Answer 2

1:9  2:8  and i don't know 3 i hope this helped