Solving Systems of Equations

x+y=1
3x-y=11

• (3,-2)
• (2,-3)
• (-3,-2)
• (-3,2)

2x+y=19
x-y+11

• (11,1)
• (-10,-1)
• (10,-1)
• (10,1)

5x+3y=5
3x+2y=4

• (5,-2)
• (-2,4)
• (2,5)
• (-2,5)

Solve the system by elimination.  

−8x − 10y = 20
−8x − 6y = −4 

• Infinite number of solutions  
• (6, 5) 
• (−6, −5) 
• (5, −6) 

Tags

CCSS.8.EE.C.8B

Solve using elimination. 
 4x + 8y = 20
-4x + 2y = -30

• (-7,1)
• (2,-5)
• (-2,5)
• (7,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination.  

−8x − 10y = 20
−8x − 6y = −4 

• Infinite number of solutions  
• (6, 5) 
• (−6, −5) 
• (5, −6) 

What is the slope of the linear equation:
y = -5x + 6?

• 1/5
• 6
• -5x
• -5

If two lines are parallel how many solutions do they have?

• 1
• 2
• infinite
• none

Solve:
y=8x+1
y=6x+3

• (1, 9)
• (4, 14)
• (0, 1)
• (2, 4)

Solve:
y = -1x - 5
4x - 8y = 4

• (-3, -2)
• (5, -7)
• (3, 9)
• (-5, 4)