Pre-Calculus Homework Solutions 18

Pre-Calculus Homework Solutions 18 - 14. 23. 9 4c P ¬AP PB...

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Unformatted text preview: 14. 23. 9 4c P ¬AP PB ¬4c 2c ¬6c ¬c or c ¬2c ¬2 3 2 ¬3 3 2 PB 15. 8s s 24. M 25. M 7 ¬ 26. M ¬ AB ¬AP PB 7 ¬s 2 4s 7 ¬5s 2 8s ¬5s 9 3s ¬9 s ¬3 PB ¬4s ¬4(3) ¬12 27. M ¬ 28. 31. 32. 33. 34. 35. 6 PB AB 11 11 5 5 PB ¬AP PB ¬ 2k k 6 ¬k 6 ¬k ¬k ¬k 6 ¬5 6 ¬1 yes, because HI KJ 9 m no, because AB 13.6 cm and AC 19.3 cm not enough information to determine if 5x 1 4x 3 d ¬ (x2 x1)2 (y2 y1)2 AB 21. d GL 22. d JK ¬ ( 3 1)2 (2 0)2 ¬ ( 4)2 22 20 ¬4.5 ¬ (x2 x1)2 (y2 y1)2 ¬ [3 ( 7)]2 (3 4)2 ¬ 102 ( 1)2 ¬ 101 ¬10.0 ¬ (x2 x1)2 (y2 y1)2 ¬ (4 ¬ 42 ¬4.1 Chapter 1 x1 y1)2 (19 13 16)2 x2 y1 y2 2 0 22 0 ( 18) 2, 2 18 22 or (11, 9) 2, 2 x1 x2 y1 y2 , 2 2 6 12 3 ( 7) , 2 2 6 10 or (3, 5) 2, 2 x1 x2 y1 y2 , 2 2 2 ( 1) 5 ( 1) , 2 2 14 2 , 2 or (0.5, 2) x1 x2 y1 y2 , 2 2 3.4 ( 2.2) 7.3 ( 5.4) , 2 2 1.2 12.7 or (0.6, 6.35) 2, 2 2 , D 29. FE, FG 30. DEH 70°; 70 90, so SQT is acute. 110°; 110 90 and 110 180, so PQT is obtuse. 50°; 50 90, so T is acute. 70°; 70 90, so PRT is acute. XV bisects YXW, so YXV VXW. m YXV ¬m VXW 3x ¬2x 6 x ¬6 m YXW ¬m YXV m VXW ¬3x 2x 6 ¬3(6) 2(6) 6 ¬36 36. XW bisects YXZ, so YXW WXZ. m YXW ¬m WXZ 12x 10 ¬8(x 1) 12x 10 ¬8x 8 12x ¬8x 18 4x ¬18 x ¬9 2 m YXZ ¬m YXW m WXZ ¬12x 10 8(x 1) ¬12 9 10 8 9 1 2 2 ¬54 10 44 ¬88 11 k 20. ¬ ¬ 2k 17. 18. 19. ¬ ¬ B 8s 8s A ¬ ¬ P 16. ¬ ¬ 1.5 (y2 ¬ [ 6 ( 4)]2 ¬ ( 2)2 32 ¬3.6 ¬ 4s 2 A B x1)2 ¬ (x2 MP 2c A AB 9 9 d 0)2 ( 1 0)2 ( 1)2 ¬ 17 20 ...
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