Exercises 5.5, page 167

  1. 1. x = 1 ,  y =  − 4 ,  z = 13

  2. 3. x = 2 ,  y =  − 1 ,  z = 1

  3. 5. x = 4 ,  y =  − 3 ,  z = 3

  4. 7. l = 12 ,  w = 23 ,  h = 16

  5. 9. x = 23 ,  y =  − 13 ,  z = 1

  6. 11. x = 415 ,  y =  − 35 ,  z = 13

  7. 13. x = 34 ,  y = 1 ,  z =  − 12

  8. 15. x =  − 3 ,  y = 2 ,  z = 1

  9. 17. I1 = 3.62 ,  I2 = 5.11 ,  I3 = 1.49

  10. 19. f(x) = x2 − 3x + 5

  11. 21. P = 800 h ,  M = 125 h ,  I = 225 h

  12. 23. F1 = 9.43 N ,  F2 = 8.33 N ,  F3 = 1.67 N

  13. 25. A = 22.5 °  ,  B = 45.0 °  ,  C = 112.5 ° 

  14. 27. A − 19,400 ,  B − 20,000 ,  C − 19,900

  15. 29. MA  − 260 , MS  − 120 , PhD  − 40

  16. 31. 70 lb, 100 lb, 30 lb

  17. 33. Unlimited: x =  − 10 ,  y =  − 6 ,  z = 0

  18. 35. No solution

Get Basic Technical Mathematics, 11th Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial