Topic 4 Test Review

Choose all the equations that are true if x = 10.

1. (Hint: There are 2 answers) 

• 45.67 - 35.67 = x

• x / 30 = 3

• 3.5 + x = 20

• 3x = 30

 Greyson wrote that 10 + 10 = 20. Then he wrote that 10 + 10 - n = 20 - n. Are his equations balanced? Explain.

• Yes, because he subtracted n from both sides therefore it is still equal.

• No, it is not equal.

Which graph represents the solution to the inequality p < 10?

• 
• 
• 
• 

Nicolas's birthday is less than 16 days away. Angie writes the inequality d < 16, where d equals the number of days, to represent this. Is Angie correct? Explain.

• Yes, Angie is correct because she used the less than symbol.

• No, Angie is not correct because she should have used the less than or equal to symbol.

• No, Angie is not correct because she should have wrote d < 15.

Mr. Steele is organizing a class trip. He wants to spend no more than $500. Write an inequality to represent the number of students, y, that Mr. Steele can bring on the trip. (Hint: Letter, symbol, number)

• c > 500

• c < 500

• c ≥ 500

• c ≤ 500

The manager of a water park keeps track of the amount of money collected, m, and the number of tickets sold, t, each day. Which best describes the variables m and t?

• The variable m is the independent variable because it depends on the number of tickets sold, t.

• The variable t is the dependent variable because it depends on the amount of money collected, m, each day.

• The variable t is the independent variable because it affects the amount of money collected, m, each day.

• The variable m is independent of variable t, and variable t is independent of variable m.

 Alexandria pays a dog-walking service $40 each week to walk her dog. How much does Alexandria pay to walk her dog for 5 weeks?

• 40

• 160

• 200

• 240

 Which equation can be used to describe the pattern in the table?

• b = a - 7

• a = b - 7

• b = a + 7

• b + a = 7

What is the independent variable?

• Time is the independent variable because the distance depends on the amount of time.

• Distance is the independent variable because the time depends on the distance.

Which equation represents the graph?

• d = 6 + t

• d = 6t