Solutions

Solutions to Try Its

\frac{128}{3}

\frac{9}{2}

3. x = 20

1. The graph will have the appearance of a power function. 3. No. Multiple variables may jointly vary. 5.

y=5{x}^{2}

y=10{x}^{3}

y=6{x}^{4}

11.

y=\frac{18}{{x}^{2}}

13.

y=\frac{81}{{x}^{4}}

15.

y=\frac{20}{\sqrt[3]{x}}

17.

y=10xzw

19.

y=10x\sqrt{z}

21.

y=4\frac{xz}{w}

23.

y=40\frac{xz}{\sqrt{w}{t}^{2}}

25.

y=256

27.

y=6

29.

y=6

31.

y=27

33.

y=3

35.

y=18

37.

y=90

39.

y=\frac{81}{2}

41.

y=\frac{3}{4}{x}^{2}

43.

y=\frac{1}{3}\sqrt{x}

45.

y=\frac{4}{{x}^{2}}

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