Review Exercises 215 For Exercises 47 and 48, simplify by applying the order of operations. 50. 2 Section 3.4 For Exercises 51–62, add or subtract the mixed numbers. 51. 52. 53. 54. 55. 56. 57. 58. 59. 6 13 16 60. 8 61. 62. 11 3 5 21 13 16 4 11 14 38 9 10 42 1 8 2 3 2 5 5 11 14 3 3 8 6 4 7 1 4 15 2 1 3 3 1 4 3 4 5 5 3 8 5 1 6 4 7 12 3 15 16 1 2 7 7 5 24 10 1 2 9 8 9 3 2 yd 7 3 yd 47. 48. For Exercises 49 and 50, find (a) the perimeter and (b) the area. 49. 63 16 m 25 16 m 13 4 m 5 4 m 20 7 a11 15 1 3 b 1 7 a2 5 1 40 b 15 8 4 25 For Exercises 63–66, round the numbers to estimate the answer. Then find the exact sum or difference. 1 4 2 9 29 36 63. 64. 5 2 5 1 9 10 3 19 30 2 4 1 Estimate: ______ Estimate: ______ Exact: _________ Exact: _________ 1 8 9 10 65. 66. 43 13 15 20 23 25 65 14 Estimate: ______ Estimate: ______ Exact: _________ Exact: _________ 23 12 67. Corry drove for 4 hr in the morning and 3 hr in the afternoon. Find the total number of hours he drove. 18 68. Denise owned 2 acres of land. If she sells acres, how much will she have left? 114 Section 3.5 For Exercises 69–74, simplify by using the order of operations. Write the answer as a mixed number, if possible. 1 5 9 10 2 7 69. 1 70. a8 4 1 9 2 3 2 b 9 3 4 71. 72. a1 1 5 6 2 a4 b 1 2 5 6 b 73. 74. 5 3 4 a5 a1 23 1 8 1 5 16 1 2 5 1 16 2 9 b 2 b a11 1 8 10 11 10 3 75. In a certain region, the appraised value of a 9 10 house is of its market value. If the market value of Owen’s house is $160,000, what is the appraised value? 214 3 4 2 b 76. Nuts ’N Things makes a nut mixture from lb of 212 734 cashews, lb of peanuts, and lb of pecans.The mixture is then divided into 10 bags. How many pounds are in each bag?
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