Answer the following:

Chap Test D (comm 11 Simplify. 4x3- 4x-+ x 10d 9. 6x3 + 15x2 - 6x 8. 25d7 12- 25 n2 - 10n + 25 10. W+ 3 11. 10n2 2w/2 3w + 9 12. (6k2- 7k - 5) + (2k + 1) 13. (2)2 - 6) + (1 + 3) 7w + 3 2w 14 x+1 x-1 15. 4x 3.x W2+ 4w - 12 w - 2 Solve the equation. Check your solution 6 16. x- 1 x + 1 10 17. x+4 4x - 2 3 18. 12 d + 1 + 1- 4 d d - 4 19. 5 3x - 1 5 x - 2 x2 - 7x + 10 20. The amount of money y (in dollars per hour) that an employee earns on a project varies inversely with the amount / of time spent on the project. An employee who works 5 hours earns $15 an hour on the project. a. Write an inverse variation equation that relates t and y. b. How much does the employee earn for completing the project? C. How many hours did the employee work when the amount earned is $10 an hour? 21. You can paint a room in 9 hours. Your friend can paint the same room the room? in 12 hours. Working together, how much time does it take to paintName Chapter 11 Test A (continued) Simplify. 403+ 12a + 8 9. 8. 21/ 9. 20- 8 10. 24 - 6 19 3-3 11. 10 # + 2 + 50 + 6 12. 13. (2? - 40 + 7)+ (e - 3) 12. (q' + 39 - 18) + (9- 3) 13. 2c 14 14. 3.x2 1+ 4 15. + 1+2 x+2 2 - 1 c - 1 15. Solve the equation. Check your solution. 16. 16. 3 2 17. r + 14 17. 5y + 2 18. 3 4 7 18. 19. y+ 3 V + y - 6 19. 20. You download 10 songs on several occasions. The average time y 20. (in songs per minute) is given by y = 10 where x is the time (in minutes) it takes to download 10 songs. Graph the function. Make a conclusion from the graph. 12 10 6 0 2 4 6 8 10 121 You can paint a room in 6 hours. Your friend can paint the same room the room? in 10 hours. Working together, how much time does it take to paintchapter Test B 11 Data 1. The variable y varies directly with x. When x = -3, y = 9. Write and graph a direct variation equation that relates x and y. Answers 2. The variable y varies inversely with x. When * = 8. V = 3 . Write and graph x and y. an inverse variation equation that relates 3. You can either babysit 3 children at $4 per hour for each child or 4 children at $3 per hour for each child. Determine whether the situation represents direct variation or inverse variation. Justify your answer. Graph the function. Compare the graph to the graph of y 5. 4. + 5 X - 1 5. 1 *+3 - 2- O 2 Find the inverse of the function. Graph the inverse function. 6. f(x) = =x+2 7. f(x) = --x, where x 2 0 2" -4 2 4x 0 2 43 4 Big