D.10. CHAPTER 10
Exercise 1
1. A, B, D, E, F, I, J, K
3. C, H
5. I
7. B, I
9. F
11. 6
13. 4 ×3
15. 2 ×4
Exercise 2
1. (3, 5)
3. (−3, 3)
5. (1, 2)
7. (3, 2)
9. (15, 6)
11. (3, 4)
13. (2, 3)
15. (1.63, 0.0971)
17. m = 2, n = 3 19. w = 6, z = 1
21. (−0.462, 2.31)
23. (5, 6, 7)
25. (15, 20, 25)
27. (1, 2, 3)
29. (3, 4, 5)
31. (6, 8, 10)
33. (−2.30, 4.80, 3.09)
35. (3, 6, 9)
37. x = 2, y = 3, z = 4, w = 5
39. x = −4, y = −3, z = 2, w = 5
41. x = a − c, y = b + c, z = 0, w = a − b
43. x = 4, y = 5, z = 6, w = 7, u = 8
45. v = 3, w = 2, x = 4, y = 5, z = 6
47. t = 53.2 min; d = 200 mi
49. 1.54, −0.377, −1.15
51. −1.01, 1.69, 2.01, 1.20
53. 1597, 774, 453, 121
Exercise 3
1. −14
3. 15
5. −27
7. 17.3
9. −2/5
11. ad − bc
13.
15. (−3, 3)
17. (1, 2)
19. (3, 2)
21. (87/7, 108/7)
23. (15, 12)
25. (15, 6)
27. (3, 4)
29. (2, 3)
31. (−3, 5)
33. m = 4, n = 3
35. m = 2, n = 3
37. w = 6, z = 1
39. v = 1.05, w = 2.58
41.
43.
Exercise 4
1. 11
3. 45
5. 48
7. −28
9. 2
11. 18
13. −66
15. (5, 6, 7)
17. (15, 20, 25)
19. (1, 2, 3)
21. (3, 4, 5)
23. (6, 8, 10)
25. (−2.30, 4.80, 3.09)
27. (3, 6, 9)
29. x = 2, y = 3, z = 4, w = 5
31. x = −4, y = −3, z = 2, w = 5
33. x = a − c, y + b + c, z = 0, w = a − b
35. x = 4, y = 5, z = 6, w = 7, u = 8
37. v = 3, w = 2, x = 4, y = 5, z = 6
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