Practice and Applications

  1. 9.  − 17

  2. 11.  − 1485

  3. 13.  − 4

  4. 15. 27

  5. 17. m =  − 2 ,  b = 4

  6. 19. m = 4 ,  b =  − 52

    A line falls through (0, 4) with a rise of negative 2 and run of 1.
    A line rises through (0, negative 5 over 2) with a rise of 4 and run of 1.

  7. 21. x = 2.0 ,  y = 0.0

  8. 23. A = 2.2 ,  B = 2.7

  9. 25. x = 1.5 ,  y =  − 1.9

  10. 27. M = 1.5 ,  N = 0.4

  11. 29. x = 1 ,  y = 2

  12. 31. x = 12 ,  y =  − 2

  13. 33. i = 2 ,  v =  − 13

  14. 35. x =  − 619 ,  y = 3619

  15. 37. x = 4339 ,  y = 713

  16. 39. x = 1 ,  y = 2

  17. 41. x = 12 ,  y =  − 2

  18. 43. i = 2 ,  v =  − 13

  19. 45. x =  − 619 ,  y = 3619

  20. 47. x = 1.10 ,  y = 0.54

  21. 49. Best choices: 41, 42

  22. 51. Best choices: 47, 48

  23. 53.  − 115

  24. 55. 230.08

  25. 57. x = 2 ,  y =  − 1 ,  z = 1

  26. 59. r

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