Page 589 - Basic College Mathematics with Early Integers

566 C HAPTE R 8 I INTRODUCTION TO ALGEBRA

Objective Simplify each expression by combining like terms. See Examples 5 through 10.

25. 3x + 5x 26. 8y + 3y 27. 5n - 9n

28. 7z - 10z 29. 4c + c - 7c 30. 5b - 8b - b

31. 5x - 7x + x - 3x 32. 8y + y - 2y - y 33. 4a + 3a + 6a - 8

34. 5b - 4b + b - 15 35. 1.7x + 3.4 - 2.6x + 7.8 36. -8.6y + 1.3 - 2.9y - 14.7

37. 3x + 7 - x - 14 38. 9x - 6 + x - 10 39. 4x + 5y + 2 - y - 9x - 7

5 7 1 3 2 4 4 1
40. a + 4b + 3 - 7a - 5b - 10 41. - x - - x 42. - + y - + y
6 12 3 10 5 9 15 6

43. -5m - 2.3m + 11 + 2.5m - 15.1 44. -13n - 4.8n + 13 + 6.9n - 13.6

Objective Multiply. See Examples 11 through 14.

45. 6(5x) 46. 4(4x) 47. -2111y2 48. -3121z2 49. -0.617a2

2 3
50. -0.419a2 51. 1-6a2 52. 1-8a2 53. 21y + 22 54. 31x + 12
3 4

55. 513a - 82 56. 415y - 62 57. -413x + 72 58. -818y + 102

1 1
59. 1.215x - 0.12 60. 3.117x - 0.32 61. 1-8x - 32 62. 1-20x - 72
2 5

Objective Simplify each expression. Use the distributive property to remove parentheses first. See Examples 15 and 16.

63. 21x + 42 - 17 64. 516 + y2 - 2 65. 416n - 52 + 3n
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66. 315 - 2b2 - 4b 67. 3 + 61w + 22 + w 68. 8z + 516 + z2 + 20

69. -213x + 12 - 51x - 22 70. -315x - 22 - 213x + 12