Systems of Equations Elimination

-8x - 7y = 10

-8x + 5y = 34

answers in (x,y)

Tags

CCSS.8.EE.C.8B

-2x + y = 1
-4x + y =- 1
answers in (x,y)

• (1,3)
• no solution
• (-1,3)
• (3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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

• intersecting lines

• parallel lines

• coincident lines

• intersecting lines

Tags

CCSS.8.EE.C.8A

If a system of linear equations has one solution, what does this mean about the two lines?

• Parallel lines

• The same line

• Intersecting lines

• Coincident lines

Tags

CCSS.8.EE.C.8A

Robert is thinking of two numbers. Their sum is -10 and their difference is -2. Which system of equations represents this situation?

• x - y = -10 and x + y = -2

• x = -2 and y = -10

• x + y = -10 and x - y = -2

• x + y = -2 and x - y = -10

Tags

CCSS.HSA.CED.A.3

Erin is 3 years younger than twice Alex's age. Their ages combined are 33 years. How old are Alex and Erin. If x=Erin's age and y=Alex's age, choose the system that matches the situation.

• x + y = 33
  y = 2x - 3
• x + y = 33
  x = 2y - 3
• x + y = 33
  x = 3 - 2y
• x + y = 3
  x = 33 - 2y

Tags

CCSS.HSA.CED.A.3

Identify which method for solving systems is being described by this fact:

Use an isolated variable and plug that expression into the second equation in order to solve for the other variable. Plug that value back into the original isolated equation to solve for the second variable.

• Graphing

• Substitution

• Elimination (adding or multiplying)

• All 3 methods

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Identify which method for solving systems is being described by this fact:

Equations must have like terms "stacked" up vertically, usually written in standard form.

• Graphing

• Substitution

• Elimination (adding or multiplying)

• All 3 methods

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Identify which method for solving systems is being described by this fact:

The drawback to using this method is that integer values are not always found at the intersection point and the solution might need to be estimated.

• Graphing

• Substitution

• Elimination (adding or multiplying)

• All 3 methods

Tags

CCSS.8.EE.C.8B

-4x - 6y = 6

4x + 6y = -4

answers in (x,y)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6