Pre-Calculus Homework Solutions 87

Pre-Calculus Homework Solutions 87 - y 15 4 35 25 x y 50 y...

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45. B; } x 1 y 1 4 15 1 35 } 5 ¬ 25 x 1 y 1 50 5 ¬ 100 x 1 y 5 ¬ 50 } x 1 15 3 1 35 } 5 ¬ 27 x 1 50 5 ¬ 81 x 5 ¬ 31 Substituting 31 for x , 31 1 y 5 ¬ 50 y 5 ¬ 19 Page 183 Maintain Your Skills 46. The perpendicular segment from the point (2, 2 2) to the line y 5 x 1 2 appears to intersect the line y 5 x 1 2 at ( 2 1, 1). Use the Distance Formula to find the distance between (2, 2 2) and y 5 x 1 2. d 5 ¬ Ï ( x 2 2 w x 1 ) 2 1 w ( y 2 2 w y 1 ) 2 w 5 ¬ Ï ( 2 1 2 w 2) 2 1 w [1 2 ( w 2 2)] 2 w 5 ¬ Ï 9 1 9 w 5 ¬ Ï 18 w The distance between the line y 5 x 1 2 and the point (2, 2 2) is Ï 18 w units. 47. x 1 y 5 2 y 52 x 1 2 The perpendicular segment from the point (3, 3) to the line x 1 y 5 2 appears to intersect the line x 1 y 5 2 at (1, 1). Use the Distance Formula to find the distance between (3, 3) and x 1 y 5 2. d 5 ¬ Ï ( x 2 2 w x 1 ) 2 1 w ( y 2 2 w y 1 ) 2 w 5 ¬ Ï (3 2 1 w ) 2 1 (3 w 2 1) 2 w 5 ¬ Ï 4 1 4 w 5 ¬ Ï 8 w The distance between the line x 1 y 5 2 and the
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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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