QUIZ 13: Solving Systems of Equations using Substitution

Solve the system of equations by substitution.

 $x+y=44$  

 $y=10x$  

• (4, 40)

• (-4, 40)

• (40, 4)

• (-40, 4)

Solve the system of equations by substitution.
 $x+y=8$  

 $y=7x$  

• (1, 7)

• (7, 1)

• (-1, -7)

• (-7, -1)

Solve the system of equations by substitution.
 $y=3$  

 $-4x-4y=-24$  

• (-3, -6)

• (-3, 6)

• (3. 3)

• (-3, 3)

Solve the system of equations by substitution.
 $3x-7y=-22$  

 $y=4$  

• (2, 4)

• (-4, 2)

• (-4, -2)

• (4, -2)

Solve the system of equations by substitution.
 $2x-8y=4$  

 $y=2x-4$  

• No solution

• (-6, 0)

• (2, 0)

• (3, 0)

Solve the system of equations by substitution.
 $2x+4y=18$  

 $y=-4x+8$  

• (-1, -4)

• (1, -4)

• (1, 4)

• (-3, -4)

Given the following system of equations, Student A says the solution is (7, -5); and Student B says the solution is (-7, -5). Which student is correct?
 $2x+6y=-16$  

 $y=-3x+16$  

• Student A

• Student B

• Neither student is correct

What is the X-VALUE in the (X, Y) solution to the following system of equations?
 $-6x-2y=16$  

 $y=5x-8$  

• 8

• -3

• 0

• -6

What is the Y-VALUE in the (X, Y) solution to the following system of equations?
 $y=8x+10$  

 $2x+2y=-16$  

• -6

• 2

• -2

• 6

Solve the system using substitution.
 $y=7x-8$  

 $y=-6x+5$  

• (1, -1)

• (1, 1)

• (-1, 1)

• (-1, -1)