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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 Fall '10
 Dr.Zhan
 Calculus, PreCalculus, Harshad number, ¬AP PB

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