Exercises 5.2, page 150

  1. 1. Yes

  2. 3. The system is dependent.

  3. 5. Yes

  4. 7. No

  5. 9. No

  6. 11. Yes

  7. 13. x = 3.0 ,  y = 1.0

  8. 15. x = 3.0 ,  y = 0.0

  9. 17. x = 2.2 ,  y =  − 0.3

  10. 19. x =  − 0.9 ,  y =  − 2.3

  11. 21. s = 1.1 ,  t =  − 1.7

  12. 23. x = 0.0 ,  y = 3.0

  13. 25. x =  − 14.0 ,  y =  − 5.0

  14. 27. r1 = 4.0 ,  r2 = 7.5

  15. 29. x =  − 3.600 ,  y =  − 1.400

  16. 31. x = 1.111 ,  y = 0.841

  17. 33. Dependent

  18. 35. t =  − 1.887 ,  v =  − 3.179

  19. 37. x = 1.500 ,  y = 4.500

  20. 39. Inconsistent

  21. 41. Yes

  22. 43. No

  23. 45. 50N, 47N

  24. 47. p = 220 km/h ,  w = 40 km/h

  25. 49. $18, $4

  26. 51. m = 3 ,  b ≠  − 7

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