Systems of Equations Simple

What type of elimination would fit best for this system of equations?

6x + 5y = 4

6x – 7y = –20

• Simple Multiplication

• Subtraction

• Addition

• Complex Multiplication

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What type of elimination would fit best for this system of equations?

2x + 3y = 6

x + 2y = 5

• Addition

• Subtraction

• Simple Multiplication

• Complex Multiplication

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system of equations. Choose whether to use addition, subtraction, or simple multiplication:

-4x + 9y = 9

x - 3y = -6

• (9, 5)

• (-9, 5)

• (8, 5)

• (-9, -5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system of equations using elimination. Choose whether to use addition, subtraction, or multiplication:

4x + 8y = 20

-4x + 2y = -30

• (5, -1)

• (7, -1)

• (3, -1)

• (-7, 0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system of equations using elimination. Choose whether to use addition, subtraction, or multiplication:

7x + 2y = 24

8x + 2y = 30

• (6, -9)

• (6, -6)

• (3, 4)

• (-6, 7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Brenda had a total of $7,350 invested in two accounts. The first account earned 6% simple interest. The second account earned 10% simple interest. At the end of the year, the two accounts had earned Brenda a total of $555 in interest. The graph shows this relationship.

x = Amount invested at 6% y = Amount invested at 10%

Based on the graph, about how much was invested at each rate?

• About $3,000 was invested at 6% and $4,500 at 10%.

• About $4,500 was invested at 6% and $3,000 at 10%.

• About $7,300 was invested at 6% and $7,300 at 10%.

• About $9,300 was invested at 6% and $5,500 at 10%.

Tags

CCSS.8.EE.C.8C

Tom wants to compare two different plans for gym membership. The first plan charges a sign-up fee of $25.00, then $5.00 for every visit. The second plan charges $100.00 per month with no sign-up fee. Tom creates a graph to find the solution to this pair of equations.

Which statement MOST accurately compares the two plans?

• If Tom plans to go to the gym 14 or fewer times during the month, he will pay less with the second plan.

• If Tom plans to go to the gym 14 or fewer times during the month, he will pay less with the first plan.

• If Tom plans to go to the gym 14 or more times during the month, he will pay less with the second plan.

• If Tom plans to go to the gym 14 or more times during the month, he will pay less with the first plan.

Tags

CCSS.8.EE.C.8C

What is the x-coordinate of the solution to this system of equations?

Mathematical Equivalence

ON

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

A system of two linear equations is shown on the coordinate plane.

Which of the following is the BEST estimate for the x-coordinate of the solution to this system?

• −1.8−1.8

• −0.8−0.8

• 4.5

• 5.5

Tags

CCSS.8.EE.C.8B

At an airport restaurant, 2 sodas and 4 hamburgers cost $12.00. An order of 4 sodas and 2 hamburgers costs $9.00. How much does one hamburger cost?

• $1.00

• $2.00

• $2.50

• $3.00

Tags

CCSS.8.EE.C.8C