Question

Please help!!
1.solve the system by substitution
-2.5x+y=13.5
2.25x-y=12.25
A: (-5,1)
B: (-1,5)
C: (1,-5)
D: (5,-1)

2.solve the system using elimination.
2x+6y=-12
5x-5y=10
A: (2,1)
B: (0,-2)
C: (-2,0)
D: (1,2)

3.what is the solution to the following system.
-3x-2y=-12
9x+6y=-9
A: (2,1)
B: no solution
C: (-2,-1)
D: infinitely many solutions

4. what is the solution to the following system.
3x+2y=7
-2x+3/4y=-13
A: (5,4)
B: (-5,4)
C: no solution
D: infinitely many solutions

Answer 1

A post should be used for a single question.
Asking many questions in one post becomes very confusing.
I'll help you with the first problem here.

Answer 2

Here is the problem:

1.solve the system by substitution

-2.5x+y=13.5
2.25x-y=12.25

A: (-5,1)
B: (-1,5)
C: (1,-5)
D: (5,-1)

Are you there?

Answer 3

Yeah I'm here

Answer 4

Great,. Then we can start.
Do you know how to use the substitution method to solve a system of equations?