Pre-Calculus Homework Solutions 4

Pre-Calculus Homework Solutions 4 - 57 D forty percent are...

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57. D; forty percent are jazz tapes so sixty percent are blues tapes; 0.60(80) 5 48. Page 19 Maintain Your Skills 58. B , G , E 59. Sample answer: planes ABC and BCD 60. C 61. There are five planes shown: plane ABC ,plane BCDE ,plane DEF ACDF , and plane ABEF . 62. 2 a 1 2 b ¬ 5 2(3) 1 2(8) ¬ 5 6 1 16 5 22 63. ac 1 bc ¬ 5 (3)(2) 1 (8)(2) 5 6 1 16 5 22 64. } a 2 2 c } 5 } 3 2 2 2 } 5 } 1 2 } 65. Ï ( c 2 a w ) 2 w ¬ 5 Ï (2 2 3 w ) 2 w 5 Ï ( 2 1) 2 w 5 Ï 1 w 5 1 Page 19 Practice Quiz 1 1. PR @ #$ 2. T 3. PR @ 4. TS 5 RS 1 TR TS 5 6 1 4.5 TS 5 10.5 5. TS ¬ 5 RS 1 TR 11.75 ¬ 5 RS 1 3.4 11.75 2 3.4 ¬ 5 RS 1 3.4 2 3.4 8.35 ¬ 5 RS Page 20 Geometry Activity: Probability and Segment Measure 1. WZ 5 WX 1 XY 1 YZ WZ 5 2 1 1 1 3 5 6 P ( J lies in XY ) 5 } W XY Z } 5 } 1 6 } 2. WZ 5 WX 1 XY 1 YZ WZ 5 2 1 1 1 3 5 6 P ( R lies in YZ ) 5 } W YZ Z } 5 } 3 6 } 5 } 1 2 } 3. WY 5 WX 1 XY WY 5 2 1 1 WY 5 3 P ( S lies in XY ) 5 } W XY Y } 5 } 1 3 } 4. 1; X w Y w contains all points that lie on both W w Y w and X w Z w . 5. 0; if point U lies on W w X w ,it cannot lie on Y w Z w . Distance and Midpoints Page 22 Geometry Activity: Midpoint of a Segment 1. (2, 5) 2. d 5 ¬ Ï ( x 2 2 x w 1 ) 2 1 ( w y 2 2 y 1 w ) 2 w AC 5 ¬ Ï (2 2 5 w ) 2 1 (5 w 2 5) 2 w AC 5 ¬ Ï ( 2 3) 2 w 1 0 2 w AC 5 ¬ Ï 9 w AC 5 ¬ 3 A w C w > ¬ C w B w , so both are 3 units long. 3. ( 2 1, 5) 4. d 5 ¬ Ï ( x 2 2 x w 1 ) 2 1 ( w y 2 2 y w 1 ) 2 w XZ 5 ¬ Ï [ 2 1 2 w ( 2 4)] w 2 1 (5 w 2 3) 2 w XZ 5 ¬ Ï 3 2 1 2 w 2 w XZ 5 ¬ Ï 13 w X w Z w > ¬
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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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