Solving Systems by Substitution and Graphing

Solve the system using substitution.

y = -3x + 11

5x + y = 21

• (1, -5)

• (1, 5)

• (5, -4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using substitution.

y = -6x + 5

-2x + y = 5

• (-3, -6)

• (-6, 3)

• (0, 5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system of equations by graphing or substitution.

y = 4x - 2

y = -x + 3

• (-2,-1)

• (-1,-2)

• (1,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

^{What is the solution?}

• (1, -1)

• -2

• (1, 2)

Tags

CCSS.8.EE.C.8B

These two lines intersect at _____.

• (4, -2)

• (4, 2)

• (-2, 4)

Tags

CCSS.8.EE.C.8B

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• same lines

Tags

CCSS.8.EE.C.8A

How many solutions will this system have?

• One

• Infinite solutions

• No solution

Tags

CCSS.8.EE.C.8A

How many Solutions?

• One solution

• No solution

• Infinitely many solutions

Tags

CCSS.8.EE.C.8A

What is the solution?
(Hint:  Both lines are graphed over each other)

• One Solution
• No solution
• Infinitely Many Solutions

Tags

CCSS.8.EE.C.8A

Solve the system by substitution.

-5x - 4y = -9

y = 6

• (3, 6)

• (6, -3)

• (-3, 6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6