C Challenge

19. Track The sketch below shows the distance three runners travel during a race. Describe what occurs at times A, B, C, and D. In what order do the runners finish? Explain.

    
    Image Long Description

    Three-Person Race

20. Reasoning The graph below shows the vertical distance traveled as Person A walks up a set of stairs and Person B walks up an escalator next to the stairs. Copy the graph. Then draw a line that could represent the vertical distance traveled as Person C rides the escalator standing still. Explain your reasoning.

    

    Escalator and Stairs

Standardized Test Prep

SAT/ACT

21. The graph below shows your distance from home as you walk to the bus stop, wait for the bus, and then ride the bus to school. Which point represents a time that you are waiting for the bus?

    1. A
    2. B
    3. C
    4. D

22. What is the solution of − 2 x < 4 ? negative 2 x less than 4 question mark

    6. x < 2 x less than 2
    7. x > 2 x greater than 2
    8. x < − 2 x less than negative 2
    9. x > − 2 x greater than negative 2

Short Response

23. You earn $8.50 per hour. Then you receive a raise to $9.35 per hour. Find the percent increase. Then find your pay per hour if you receive the same percent increase two more times. Show your work.

Mixed Review

See Lesson 3-8.

Let A = { − 3 , 1 , 4 } , B = { x | x eh equals left brace negative 3 comma 1 comma 4 right brace comma b equals left brace bold italic x vertical line bold italic x  is an odd number greater than − 2 negative 2  and less than 10}, and C = { 1 , 4 , 7 , 12 } . c equals left brace 1 comma 4 comma 7 comma 12 right brace .  Find each union or intersection.

24. A ∪ B eh union b
25. A ∩ B eh intersection b
26. B ∪ C b union c
27. A ∩ C eh intersection c

Get Ready! To prepare for Lesson 4-2, do Exercises 28 and 29.

See Lesson 1-9.

Use a table, an equation, and a graph to represent each relationship.

28. Donald is 4 years older than Connie.
29. You make 3 cards per hour.

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