Feb 24th Systems by Substitution

6x + y = -1
y = -3x - 4

• (3, 1)
• (1, 7)
• (-3, 1)
• (1, -7)

y = -3x + 11
5x + y = 21

• (1, -5)
• (1, 5)
• (-4, 5)
• (5, -4)

y = -2x + 18
y = 8

• (5, 8)
• (-5, 8)
• (2, 8)
• (-2, 8)

5x + y = -10
y = -6x - 13

• (4, 5)
• (-3, -3)
• (3, 5)
• (-3, 5)

7x + y = -20
y = 3x + 10

• (-3, 1)
• (-1, -3)
• (-3,-7)
• (-1,7)

Solve the following system:

 $y=6x-11$  

 $-2x-3y=-7$  

•  $\left(2,\ 1\right)$  

•  $\left(1,\ 3\right)$  

•  $\left(2,\ 5\right)$  

•  $\left(3,\ 2\right)$  

Solve the following system:

 $y=-2$  

 $4x-3y=18$  

•  $\left(3,\ -2\right)$  

•  $\left(3,\ 2\right)$  

•  $\left(-2,3\right)$  

•  $\left(2,\ 3\right)$  

Solve the following system:

 $y=5x-2$  

 $-3x+6y=-12$  

•  $\left(0,\ -2\right)$  

•  $\left(0,\ 2\right)$  

•  $\left(-2,\ 0\right)$  

•  $\left(2,\ 0\right)$  

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• intersecting lines

^{What is the solution to the system?} 

• (1,1)
• -2
• (1, 2)
• (1, -1)