ANSWER KEY
Solve each system using substitution.
1.y = 4x – 8
y = 2x - 4
G. (-2,0)
H. (-2,-4)
I. (2,0)
J. No solution
5. y = x
y = -2x – 12
A. (-4,-4)
B. (-4,4)
C. No solution
D. (-1,4)
9. y = 3x – 11
y = -2x + 4
J.
K.
L.
M.
(-3,3)
(3,-2)
(-3,-2)
(-3,-3)
2. y = -3x – 1
y = 4x + 6
3. y = 4x - 12
y = -3x + 2
T. (1,4)
U.(1,-4)
V.(1,-2)
W.(-1,2)
K. (2,4)
L. (2,-4)
M. (-2,4)
N. (-2,-4)
6. y = -2x – 6
y=x
7. y = -4x – 5
y=x
K.
L.
M.
N.
(-2,-2)
(-2,2)
(2,3)
(-2,-3)
10. y = -4x + 10
y = 3x – 11
K.
L.
M.
N.
(1,-3)
(3,-2)
(-1,-3)
(-2,3)
F.
G.
H.
I.
(2,-2)
(-1,1)
(-2,2)
(-1,-1)
11. y = -2x – 8
y = -3x – 10
D.
E.
F.
G.
(2,-4)
(-2,-4)
Infinite solutions
No solution
4. y = 2x + 4
y = 4x + 6
D. (-1,-3)
E. (-1,2)
F. (-3,1)
G. (-1,-2)
8. y = x – 6
y = 3x – 10
T.(2,-4)
U. (2,4)
V. (3,-4)
W.(1,-4)
12. y = -4x – 3
y = -2x – 3
A.
B.
C.
D.
(0,-3)
(0,3)
(3,0)
(-2,3)
What do you get when you cross a
centipede with a parrot?
A WALKIE TALKIE!
Solve each system by substitution.
1.y = 4x – 8
y = 2x - 4
G. (-2,0)
H. (-2,-4)
I. (2,0)
J. No solution
5. y = x
y = -2x – 12
A. (-4,-4)
B. (-4,4)
C. No solution
D. (-1,4)
3. y = 4x - 12
y = -3x + 2
T. (1,4)
U.(1,-4)
V.(1,-2)
W.(-1,2)
K. (2,4)
L. (2,-4)
M. (-2,4)
N. (-2,-4)
6. y = -2x – 6
y=x
7. y = -4x – 5
y=x
K.
L.
M.
N.
9. y = 3x – 11
y = -2x + 4
J.
K.
L.
M.
2. y = -3x – 1
y = 4x + 6
(-2,-2)
(-2,2)
(2,3)
(-2,-3)
10. y = -4x + 10
y = 3x – 11
(-3,3)
(3,-2)
(-3,-2)
(-3,-3)
K.
L.
M.
N.
(1,-3)
(3,-2)
(-1,-3)
(-2,3)
F.
G.
H.
I.
4. y = 2x + 4
y = 4x + 6
D. (-1,-3)
E. (-1,2)
F. (-3,1)
G. (-1,-2)
8. y = x – 6
y = 3x – 10
(2,-2)
(-1,1)
(-2,2)
(-1,-1)
T.(2,-4)
U. (2,4)
V. (3,-4)
W.(1,-4)
11. y = -2x – 8
y = -3x – 10
D.
E.
F.
G.
12. y = -4x – 3
y = -2x – 3
(2,-4)
(-2,-4)
Infinite solutions
No solution
A.
B.
C.
D.
(0,-3)
(0,3)
(3,0)
(-2,3)
What do you get when you
cross a centipede with a parrot?
_
5
_ _ _ _ _ _
2
12 10 6
1
4
_ _ _ _ _ _!
8 12
3
9
7 11