1. 9 Weeks Test Review 8 TH GRADE

2. Simplify…if possible3  3 y + 2 y + y 2 + 5 + y

3. Answer3  y 2 + 6 y + 5

4. Simplify…if possible4  3 y 2 + 2 xy + 1 + 3 x + y + 2 x 2

5. Answer4  not possible to simplify this expression, since none of the terms are alike

6. Finding Area11  Susan’s apartment is shown at right.  Assuming that all rooms are rectangular, find the areas described below. All measurements are in feet.  Find the area of her living room.

7. Answer11  15 · 18 = 270 ft 2

8. Simplify…if possible5  3 xy + 5 x + 2 + 3 y + x + 4

9. Answer5  3 xy + 6 x + 3 y + 6

10. Think about Algebra Tiles…1  Suppose you put one of your x ‑ tiles and two unit tiles with another pile of three x ‑ tiles and five unit tiles. What is in this new pile? Write it as a sum.

11. Answer1  4x + 7

12. Simplify…if possible6  4 m + 2 mn + m 2 + m + 3 m 2

13. Answer6  4 m 2 + 5 m +2 mn

14. Simplify…if possible7  8 x 2 + 3 x − 13 x 2 + 10 x 2 − 25 x − x

15. Answer7  5 x 2 − 23 x

16. Algebra Tiles2  Suppose one person in your team has two x 2 ‑ tiles, three x ‑ tiles, and one unit tile on his desk and another person has one x 2 ‑ tile, five x ‑ tiles, and eight unit tiles on her desk.  You decide to put all of the tiles together on one desk.  What is the name for this new group of tiles?

17. Answer2  3x 2 + 8x + 9

18. Simplify…if possible8  4 x + 3 y

19. Answer8  4 x + 3 y  Can’t be simplified because of different variables

20. Find the length of the missing side10

21. Answer10  7.5 in

22. Combine Like Terms9  20 + 3 xy − 3 + 4 y 2 + 10 − 2 y 2

23. Answer9  2 y 2 + 3 xy + 27

24. Finding Area12 Find the area of her entire apartment.

25. Answer12  28 · 23 = 644 ft 2

26. Finding Perimeter13 Find the perimeter of the kitchen.

27. Answer13  52 feet

28. Patterns14 How does the pattern grow?

29. Answer14  It grows by two tiles each time.

30. Ordered Pairs15  What are the coordinates of the two points in Quadrant II?

31. Answer15  (–3, 1) and (–2, 3)

32. Reading a Table17 What can you tell Riley about his plant based on the data?

33. Answer17  It is growing faster as the days go by.

34. Ordered Pairs16 What are the coordinates of the two points in Quadrant IV?

35. Answer16  (2, –1) and (3, –2)

36. Substitution18

37. Answer18  11

38. Substitution19

39. Answer19  14

40. Substitution20

41. Answer20 10

42. Substitution21 2 xy x = 5 and y = −3

43. Answer21  −30

44. Total Bill…before tax26  Bo buys 3 flower pots. He has a coupon for $5 off his purchase at the store. If each pot costs $8, how much is his total bill before tax?

45. Answer26  $19

46. Evaluate22  k − m if k = 4 and m = −10

47. Answer22  14

48. Evaluate23 x 2 + y 2 if x = 7 and y = 5

49. Answer23  74

50. Making Equations28  International Phone Company charges a $3 flat rate plus $0.25 per minute for each phone call between Bolivia and the United States.  If C represents cost and M represents minutes, make an equation to model this situation.

51. Answer28  3.00 +.25m = C

52. Solve24  y = 2x +3 when x = 4, what does y equal?

53. Answer24  14

54. Solve25  3 + k = t when t = 14 what does k equal?

55. Answer25  11

56. Making Change29  Fabian bought two football tickets to the football game at a cost of $12.50 each.  If he paid with two $20 bills, how much change will Fabian receive?

57. Answer29  $15.00

58. Analyze this expression27 8x – 3(x+4) What is the simplified form of this expression?

59. Answer27  5x - 12