It would help if we were able to see the previous exercises to help you with these.
Answer:
sorry that it's sideways.
and sorry if I didn't answer your question, because it dosent really make sense.
all I understand is find X from y=3x-9
and I did find X, but I hope this helps
Answer:

Step-by-step explanation:
The given equation is 
We want to rearrange this equation so that, n becomes the independent variable.
This means we must solve form, m which becomes the dependent variable.
We expand the parenthesis to get:

We now subtract 1 from both sides to obtain:

We simplify to obtain:

This can be rewritten as

Answer:
2
Step-by-step explanation:
The answer is A because opposite angles are the same. Therefore, 1 and 2 are congruent because their angle sizes are exactly the same.