Pre-Calculus Homework Solutions 20

# Pre-Calculus Homework Solutions 20 - 11 3c 2c 29 U V UW 4c...

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11. UW 5 ¬ UV 1 VW 2 4 c 5 ¬ 3 c 1 29 1 ( 2 2 c 2 4) 2 4 c 5 ¬ c 1 25 2 5 c 5 ¬ 25 c 5 ¬ 2 5 VW 5 ¬ 2 2 c 2 4 5 ¬ 2 2( 2 5) 2 4 5 6 12. d 5 ¬ Ï ( x 2 2 x w 1 ) 2 1 ( w y 2 2 y w 1 ) 2 w GH 5 ¬ Ï ( 2 3 2 w 0) 2 1 w (4 2 0 w ) 2 w 5 ¬ Ï ( 2 3) 2 w 1 4 2 w 5 Ï 25 w 5 ¬ 5 13. d 5 ¬ Ï ( x 2 2 x w 1 ) 2 1 ( w y 2 2 y w 1 ) 2 w NK 5 ¬ Ï ( 2 2 2 w 5) 2 1 w (8 2 2 w ) 2 w 5 ¬ Ï ( 2 7) 2 w 1 6 2 w 5 Ï 85 w < ¬ 9.2 14. d 5 ¬ Ï ( x 2 2 x w 1 ) 2 1 ( w y 2 2 y w 1 ) 2 w AW 5 ¬ Ï [ 2 2 2 w ( 2 4)] w 2 1 [2 w 2 ( 2 4 w )] 2 w 5 ¬ Ï 2 2 1 6 w 2 w 5 Ï 40 w < ¬ 6.3 15. C 16. EC #\$ , ED #\$ 17. / ABD or / ABE 18. / 9 19. 4 r 1 7 1 r 2 2 ¬ 5 180 5 r 1 5 ¬ 5 180 5 r ¬ 5 175 r ¬ 5 35 4 r 1 7 5 ¬ 4(35) 1 7 or 147 r 2 2 5 ¬ 35 2 2 or 33 20. Let x be the measure of one angle. Then the other angle has measure x 1 26 and x 1 x 1 26 5 90. x 1 x 1 26 ¬ 5 90 2 x 1 26 ¬ 5 90 2 x ¬ 5 64 x ¬ 5 32 x 1 26 5 32 1 26 5 58 21. d 5 ¬ Ï ( x 2 2 x w 1 ) 2 1 ( w y 2 2 y w 1 ) 2 w PQ 5 ¬ Ï
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