Pre-Calculus Homework Solutions 134

Pre-Calculus Homework Solutions 134 - 8. Let the measure of...

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42. m / R 1 m / S 1 m / A 5 ¬ 180 41 1 109 1 m / A 5 ¬ 180 150 1 m / A 5 ¬ 180 m / A 5 ¬ 30 43. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 3 5 ¬ 2( x 2 4) 44. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 ( 2 2) 5 ¬ 2 3( x 2 2) y 1 2 5 ¬ 2 3( x 2 2) 45. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 ( 2 9) 5 ¬ 11[ x 2 ( 2 4)] y 1 9 5 ¬ 11( x 1 4) 46. true; 19 2 10 ¬ , ? 11 9 ¬ , 11 47. false; 31 2 17 ¬ , ? 12 14 ¬ , 12 48. true; 38 1 76 ¬ . ? 109 114 ¬ . 109 The Triangle Inequality Pages 263–264 Check for Understanding 1. Sample answer: If the lines are not horizontal, then the segment connecting their y -intercepts is not perpendicular to either line. Since distance is measured along a perpendicular segment, this segment cannot be used. 2. Jameson; 5 1 10 . 13 but 5 1 8 ³ 13. 3. Sample answer: 2, 3, 4 and 1, 2, 3 4. Check each inequality. 5 1 4 ¬ . ? 34 1 3 ¬ . ? 55 1 3 ¬ . ? 4 9 ¬ . 3 7 ¬ . 5 8 ¬ . 4 All of the inequalities are true, so 5, 4, and 3 can be the lengths of the sides of a triangle. 5. 5 1 10 ¬ . ? 15 15 ¬ ³ 15 Because the sum of two measures equals the third measure, the sides cannot form a triangle.
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.

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