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Study Guides > College Algebra

Solutions

Solutions to Try Its

1. 1283\frac{128}{3} 2. 92\frac{9}{2} 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. y=5x2y=5{x}^{2} 7. y=10x3y=10{x}^{3} 9. y=6x4y=6{x}^{4} 11. y=18x2y=\frac{18}{{x}^{2}} 13. y=81x4y=\frac{81}{{x}^{4}} 15. y=20x3y=\frac{20}{\sqrt[3]{x}} 17. y=10xzwy=10xzw 19. y=10xzy=10x\sqrt{z} 21. y=4xzwy=4\frac{xz}{w} 23. y=40xzwt2y=40\frac{xz}{\sqrt{w}{t}^{2}} 25. y=256y=256 27. y=6y=6 29. y=6y=6 31. y=27y=27 33. y=3y=3 35. y=18y=18 37. y=90y=90 39. y=812y=\frac{81}{2} 41. y=34x2y=\frac{3}{4}{x}^{2} Graph of y=3/4(x^2). 43. y=13xy=\frac{1}{3}\sqrt{x} Graph of y=1/3sqrt(x). 45. y=4x2y=\frac{4}{{x}^{2}} Graph of y=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

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