Solutions to Try Its
1. [latex]\frac{128}{3}[/latex]
2. [latex]\frac{9}{2}[/latex]
3. x = 20
Solutions to Odd-Numbered Exercises
1. The graph will have the appearance of a power function.
3. No. Multiple variables may jointly vary.
5. [latex]y=5{x}^{2}[/latex]
7. [latex]y=10{x}^{3}[/latex]
9. [latex]y=6{x}^{4}[/latex]
11. [latex]y=\frac{18}{{x}^{2}}[/latex]
13. [latex]y=\frac{81}{{x}^{4}}[/latex]
15. [latex]y=\frac{20}{\sqrt[3]{x}}[/latex]
17. [latex]y=10xzw[/latex]
19. [latex]y=10x\sqrt{z}[/latex]
21. [latex]y=4\frac{xz}{w}[/latex]
23. [latex]y=40\frac{xz}{\sqrt{w}{t}^{2}}[/latex]
25. [latex]y=256[/latex]
27. [latex]y=6[/latex]
29. [latex]y=6[/latex]
31. [latex]y=27[/latex]
33. [latex]y=3[/latex]
35. [latex]y=18[/latex]
37. [latex]y=90[/latex]
39. [latex]y=\frac{81}{2}[/latex]
41. [latex]y=\frac{3}{4}{x}^{2}[/latex]
43. [latex]y=\frac{1}{3}\sqrt{x}[/latex]
45. [latex]y=\frac{4}{{x}^{2}}[/latex]
47. 1.89 years
49. 0.61 years
51. 3 seconds
53. 48 inches
55. 49.75 pounds
57. 33.33 amperes
59. 2.88 inches