Solve Systems of Equations by Elimination Day 1

What period do you have Algebraic Reasoning?

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 by elimination
-6x + 5y = 1
6x + 4y = -10

• (1,-1)
• (0,-1)
• (1,1)
• (-1,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination.  

12x + 36y = −3 
−12x − 36y = 0 

• (10, 1) 
• (−10, −1) 
•  (10, −1) 
•  No solution 

Tags

CCSS.8.EE.C.8B

Solve the system by elimination. 
−4x − 4y = 0
4x + 4y = 0 

• (−6, −4) 
• Infinite number of solutions  
• (−6, 10) 
• (6, 4) 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
-9x - 4y = -20
5x + 4y = 4

• (-4,4)
• (4,4)
• (4,-4)
• (-4,-4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

How can you add eight 8's to make 1000?

• 88 + 8888 + 1000
• 8888 + 8 + 88 + 88 = 1000
• 888 + 88 + 8 + 8 + 8 = 1000
• 8 + 8 + 888 + 888 = 1000