By by James Hamblin Smith
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All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it. qxp 14 10/21/10 Chapter P 2:16 PM Page 14 Prerequisites 150. From the foot bones of an adult human male, an anthropologist estimates that the person’s height was 69 inches.
63. 65. 68. 70. 72. 74. 76. ͑x Ϫ 5͒2 ϭ 30 ͑2x ϩ 3͒2 Ϫ 27 ϭ 0 ͑x ϩ 5͒2 ϭ ͑x ϩ 4͒ 2 x2 ϩ 6x ϩ 2 ϭ 0 x 2 ϩ 8x ϩ 14 ϭ 0 9x 2 Ϫ 12x ϭ 14 4x 2 Ϫ 4x Ϫ 99 ϭ 0 3x2 ϩ 9x ϩ 5 ϭ 0 Copyright 2011 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience.
5 2 52. 0 Յ In Exercises 91–98, use absolute value notation to define the interval (or pair of intervals) on the real number line. 91. x −3 −2 −1 0 1 2 3 92. x −3 −2 −1 0 1 2 3 93. In Exercises 57–72, solve the inequality and sketch the solution on the real number line. ) ԽԽ 57. x < 5 x 59. > 1 2 61. x Ϫ 5 < Ϫ1 63. x Ϫ 20 Յ 6 65. 3 Ϫ 4x Ն 9 xϪ3 67. Ն4 2 69. 9 Ϫ 2x Ϫ 2 < Ϫ1 71. 2 x ϩ 10 Ն 9 ԽԽ Խ Խ Խ Խ Խ Խ ԽԽ Խ Խ Խ Խ ԽԽ 58. x Ն 8 x 60. > 3 5 ԽԽ Խ Խ Խ 62. x Ϫ 7 < Ϫ5 64. x Ϫ 8 Ն 0 66. 1 Ϫ 2x < 5 2x 68.