Open Up Grade 8 Unit 4 Review

A circle has a mass of 3 grams and a square has a mass of 2 grams. Which is the mass of a triangle?

• 1 gram

• 5 grams

• 3 grams

• 2.5 grams

Tags

CCSS.8.EE.C.7B

Select all the systems of equations that have exactly one solution.

• y=3x+1

  y=-3x+7

• x+y=10

  x+y=12

• y=3x+1

  y=3x+7

• y=3x+1

  y=x+1

• x+y=10

  2x+2y=20

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Here is the graph for one of the equations in a system of two equations. The solution to the system is (6,2). Select all the equations that could be the other equation in the system.

• y=-3x

• y=1/2x−1

• y=-1/6x+3

• y=2/3x−1

Tags

CCSS.8.EE.C.8B

Solve. 1/2x−7=1/3(x−12)

• x=5

• x=6

• x=18

• x=22

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.REI.A.2

Solve this system of equation.

3x+4y=36

y=-1/2x+8

• x=5, y=3

• x=4, y=8

• x=3, y=6

• x=4, y=6

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Andre and Elena are each saving money. Andre starts with $100 in his savings account and adds $5 per week. Elena starts with $10 in her savings account and adds $20 each week. After four weeks, who has more money in their savings account?

• Andre

• Elena

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

Andre and Elena are each saving money. Andre starts with $100 in his savings account and adds $5 per week. Elena starts with $10 in her savings account and adds $20 each week. After how many weeks will Andre and Elena have the same amount of money in their savings accounts?

• 2 weeks

• 3 weeks

• 5 weeks

• 6 weeks

Tags

CCSS.8.EE.C.8C

60 people attend a game night. Everyone chooses to play chess, a two-player game, or cribbage, a four-player game. All 60 people are playing either chess or cribbage. There are 3 more games of cribbage being played than games of chess being played. How many of each game are being played?

• 8 chess, 15 cribbage

• 6 chess, 11 cribbage

• 8 chess, 11 cribbage

• 7 chess, 10 cribbage

Tags

CCSS.8.EE.C.8C

In a basketball game, Elena scores twice as many points as Tyler. Tyler scores four points fewer than Noah, and Noah scores three times as many points as Mai. If Mai scores 5 points, how many points did Elena score?

• 24 points

• 20 points

• 22 points

• 18 points

Tags

CCSS.8.EE.C.7B

What is the weight of a square if a triangle weighs 4 grams?

• 3 grams

• 2 grams

• 8 grams

• 6 grams

Tags

CCSS.7.EE.B.4A