Inequalities and Simultaneous Equations

Solve:

3x - y = 11

x + y = 5

• x = 4

  y = 1

• x = 4

  y = -1

• x = -4

  y = 1

• x = -4

  y = -1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:

2x + 3y = 5

x + 3y = 7

• x = -2

  y = 3

• x = -2

  y = -3

• x = 2

  y = 3

• x = 2

  y = -3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:

2x + 5y = 29

x + 5y = 22

• x = 7

  y = 3

• x = -7

  y = -3

• x = 7

  y = -3

• x = -7

  y = 3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:

3x + 5y = 4

4x - 5y = -18

• x = -2

  y = 2

• x = -2

  y = -2

• x = 2

  y = -2

• x = 2

  y = 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:

3x - 4y = 26

2x - 4y = 20

• x = 6

  y = -2

• x = -6

  y = -2

• x = -6

  y = 2

• x = 6

  y = 2

Tags

CCSS.HSA.REI.C.9

Solve:

2x + y = 16

4x - y = 2

• x = 3

  y = 10

• x = -3

  y = -10

• x = -3

  y = 10

• x = 3

  y = -10

Tags

CCSS.HSA.REI.C.9

Solve:

4x - y = 17

7x - y = 32

• x = 5

  y = 3

• x = -5

  y = 3

• x = 5

  y = -3

• x = -5

  y = -3

Tags

CCSS.HSA.REI.C.9

Some horses and chickens are in a pasture. If there are a total of 28 animals and 80 legs, how many chickens and how many horses are there? (Hint: Write simultaneous equations and then solve)

• 10 horses, 18 chickens

• 16 horses, 12 chickens

• 12 horses, 16 chickens

• 18 horses, 10 chickens

Tags

CCSS.8.EE.C.8C

Solve
 $3x+y=1$  
 $x-2y=19$  

•  $x=-4,\ y=3$  

•  $x=3,\ y=-4$  

•  $x=3,\ y=-8$  

•  $x=4,\ y=8$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

8x ≥ -32

• x ≥ -4
• x ≥ 4
• x ≤ -4
• x ≥ 4

Tags

CCSS.6.EE.B.8