Review for Quiz Unit 6 #1

Solve each system by graphing.

 $3x-y=-1$  
 $x+y=-3$  

•  $\left(-2,\ 1\right)$  

•  $\left(-2,\ -1\right)$  

•  $\left(1,\ -2\right)$  

•  $\left(-1,\ -2\right)$  

Solve each system by graphing.

 $y=-\frac{1}{2}x-3$  
 $y=-3x+2$  

•  $\left(2,\ -3\right)$  

•  $\left(2,\ -4\right)$  

•  $\left(2,\ 3\right)$  

•  $\left(-2,\ 3\right)$  

Solve each system by graphing.

 $0=4-y-4x$  
 $2y+x=-6$  

•  $\left(-2,4\right)$  

•  $\left(-4,-2\right)$  

•  $\left(4,-2\right)$  

•  $\left(2,-4\right)$  

Solve each system by substitution.
 $y=-3x+18$  

 $y=2x-2$  

•  $\left(4,\ -6\right)$  

•  $\left(-6,\ 4\right)$  

•  $\left(4,\ 6\right)$  

•  $\left(-4,\ -6\right)$  

Solve each system by substitution.
 $y=-3x+2$  

 $2x-7y=14$  

•  $\left(0,\ 2\right)$  

•  $\left(2,\ 0\right)$  

•  $\left(-2,\ 0\right)$  

•  $\left(6,\ 0\right)$  

Solve each system by substitution.
 $-x+5y=7$  

 $x-y=-7$  

•  $\left(8,\ 4\right)$  

•  $\left(-7,\ 0\right)$  

•  $\left(7,\ 0\right)$  

• Infinite number of solutions

Solve each system by elimination.

 $-7x+6y=-12$  
 $10x-6y=30$  

• No solution

•  $\left(-1,\ -6\right)$  

•  $\left(-1,\ 6\right)$  

•  $\left(6,\ 5\right)$  

Solve each system by elimination.

 $-7x-10y=-3$  
 $-6x-10y=-4$  

•  $\left(-1,\ 1\right)$  

•  $\left(-1,\ -2\right)$  

•  $\left(-1,\ 2\right)$  

•  $\left(6,\ -2\right)$  

Solve each system by elimination.

 $48x-12y=-3$  
 $-8x+2y=2$  

•  $\left(6,\ 7\right)$  

•  $\left(6,\ -9\right)$  

•  $\left(-6,\ 4\right)$  

• No solution

Solve each system by elimination.

 $4x+6y=18$  
 $5x-5y=10$  

•  $\left(7,\ 3\right)$  

•  $\left(1,\ 3\right)$  

•  $\left(3,\ 1\right)$  

• No solution