few math questions Algebra help!?

Question

first question:

1)Is this dependent or independent

9x=3y+12

4=3x-y

2)Solve equation by Substitution

2x+5y=-2

4x+10y=10

3)graph

x+y=1

x-y=-5

Answer 1

Favorite Answer

1) Dependent.

2) No solution.

3) i. Graph going up and to the left, crossing at (1,0) and (0,1)

ii. Graph going up and to the right crossing at (-5,0) and (0,5)