Elimination and Substitution

Which method would be best (quickest) for solving the system below:
x + y = 11
3x - 4y = -2

• Substitution
• Elimination
• Graphing
• None of these

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system:

x + y = 19

y = 3x - 1

• (x = 4, y = 15)

• (x = 11,y= 8)

• (x=5, y=14)

• (x= 8, y= 11)

Solve the system:

3x + y = 19

2x - y = 6

• (x=5, y=14)

• (x=4,y= 5)

• (x=5, y=4)

• (x=14,y=5)

Which method would be best (quickest) for solving the system below:
3x - 4y = -2
y = 2x + 1

• Substitution
• Elimination
• Graphing
• None

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system:

2x - 5y = 12

y = -2

• y = -2

• (x=11, y= -2)

• (x= 1, y= -2)

• no solution

Solve the system:

x + 6y = 17

x - 3y = 8

• (x= 5, y= 2)

• (x= 11, y= 1)

• (x= 1,y= 11)

• no solution

y = 5x + 1

y = 3x + 13

• (x= 6,y= 31)

• (x= 31, y= 6)

• (x= 4, y= 21)

• (x= 2, y= 11)

y = 3x - 1

2x + 2y = 22

• (x=2, y=5)

• (x=3, y=8)

• (x=4, y=11)

• (x=5, y=14)

7x - y = -10

-7x + 5y = -6

• (x= -2, y= -4)

• (x= -2,y= -1)

• (x= -4,y= -1)

• (x= 6,y = -8)

x - 5y = 5
3x + y = 31

• (10, -1)
• (9, 4)
• (10, 1)
• (55, 10)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6