Systems of Equations by Graphing, Substitution, Adding or Subtracting

Which is the correct setup for substitution for the system?

• 6x+4(2y)=16

• 6(2y)+4y=16

• 6x+4y=2y

• 2y=6x+4y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which of the following will NOT allow elimination by adding or subtracting?

• Multiply the top row by 26 and the bottom row by 13

• Multiply the top row by 13 and the bottom row by 11

• Multiply the top row by 2

• Multiply the top row by -39 and the bottom row by 12

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Two groups of friends went to the movies.

The first group bought 3 sodas and 4 popcorns for $25.75

The second group bought 2 sodas and 3 popcorns for $18.75

What is the cost of ONE POPCORN? (HINT: x=soda, y=popcorn (a)   there is elimination)

Tags

CCSS.8.EE.C.8C

Which of the following is the correct setup for solving the system using substitution?

• -34(3x-17)=-54

• -34x-54=3x-17

• 3x-54=-34x-17

• 3(-34x-54)-17=y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations by substitution.
y = -4x + 5
y =  3x - 16

• (-3, -25)

• (3,-7)

• (11, 17)

• (21, 47)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which method is most appropriate?

• Substitution

• Elimination

• Graphing

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Determine how many solutions the system has.
(Hint:  Both lines are graphed over each other)

• One Solution

• No solution

• Infinitely Many Solutions

• I am Spartacus!

Tags

CCSS.8.EE.C.8A

What is the solution to the system?

• (0, 3)

• (1, -1)

• (-3, 1)

• (1, 3)

Tags

CCSS.8.EE.C.8B

The solution (x, y) to a system of equations is the point where they...? 

• Run off the graph

• Don't touch

• Intersect

• Exist

Tags

CCSS.8.EE.C.8B

________________ is a set of two or more equations that have the same variables.

• solution of a system

• elimination method

• system of equations

• table

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6