Pre-Calculus Homework Solutions 74

Pre-Calculus Homework Solutions 74 - 21 First write an...

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17. Graph line , and point P .Construct m perpendicular to , through P .Line m appears to intersect line , at (4, 0). Use the Distance Formula to find the distance between P and , . d 5 ¬ Ï ( x 2 2 w x 1 ) 2 1 w ( y 2 2 w y 1 ) 2 w 5 ¬ Ï (4 2 4 w ) 2 1 (3 w 2 0) 2 w 5 ¬ Ï 9 w 5 3 The distance between P and , is 3 units. 18. Graph line , and point P .Construct m perpendicular to , through P .Line m appears to intersect line , at (1, 3). Use the Distance Formula to find the distance between P and , . d 5 ¬ Ï ( x 2 2 w x 1 ) 2 1 w ( y 2 2 w y 1 ) 2 w 5 ¬ Ï ( 2 4 2 w 1) 2 1 w (4 2 w 3) 2 w 5 ¬ Ï ( 2 5) 2 w 1 1 2 w 5 Ï 26 w The distance between P and , is Ï 26 w units. 19. The lines y 52 3 and y 5 1 are horizontal lines. The y -axis is perpendicular to these lines. The y -intercept of y 52 3 is (0, 2 3). The y -axis intersects the line y 5 1 at the point (0, 1). Use the Distance Formula to determine the distance between (0, 2 3) and (0, 1). d
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