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Pre-Calculus Homework Solutions 65

# Pre-Calculus Homework Solutions 65 - 5 10)2[7 6]2 15)2 1)2...

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AC ¬ ( 5 10) 2 [7 ( 6)] 2 ¬ ( 15) 2 ( 1) 2 ¬ 226 AB BC AC ¬ 148 10 226 ¬ 30.36 67. d ¬ ( x 2 x 1 ) 2 ( y 2 y 1 ) 2 AB ¬ [2 ( 3)] 2 ( 9 2) 2 ¬ 5 2 ( 11) 2 146 BC ¬ (0 2) 2 [ 10 ( 9)] 2 ¬ ( 2) 2 ( 1) 2 5 AC ¬ [0 ( 3)] 2 ( 10 2) 2 ¬ 3 2 ( 12) 2 153 AB BC AC ¬ 146 5 153 ¬ 26.69 68. 2 and 5, 3 and 8 69. 1 and 5, 2 and 6, 4 and 8, 3 and 7 70. 1 and 7, 4 and 6 71. 2 and 8, 3 and 5 Page 150 Practice Quiz 2 1. slope of AB ¬ 1 6 ( 3 1) ¬ 2 3 slope of CD ¬ 4 2 ( ( 2 2 ) ) ¬ 6 4 or 3 2 The slopes are not the same, so AB and CD are not parallel. The product of the slopes is 2 3 3 2 or 1, so AB and CD are not perpendicular. Therefore, AB and CD are neither parallel nor perpendicular. 2. slope of AB ¬ 13 3 ( ( 1 3 1 ) ) ¬ 2 6 4 or 4 slope of CD ¬ 8 8 ( 0 6) ¬ 8 2 or 1 4 The product of the slopes is 4 1 4 or 1. So AB is perpendicular to CD . 3. Line p contains (0, 4) and (2, 3). m ¬ ( ( y x 2 2 y x 1 1 ) ) ¬ 3 2 ( 0 4) ¬ 7 2 4. A line parallel to q has the same slope as q. Line q contains (0, 2) and (2, 3). m ¬ ( ( y x 2 2 y x 1 1 ) ) ¬ 3 2 2 0 ¬ 1 2 5. Line r contains (1, 1) and ( 4, 3).
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