Open Up Math Algebra Unit 4

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

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

Solve. 1/2x−7=1/3(x−12)

• x=5

• x=6

• x=18

• x=22

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

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

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

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

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

• 3 grams

• 2 grams

• 8 grams

• 6 grams

Solve 3(x−4)=12x

• x= 4/3

• x= -4/3

• x= 3/4

• x= -3/4

Solve. 2(x+5)=3x+1

• x= 3

• x= 9

• x= 6

• x= 12