By Margaret L. Lial

The Lial sequence has helped millions of scholars achieve developmental arithmetic via its pleasant writing kind, quite a few reasonable examples, vast challenge units, and whole vitamins package deal. according to its confirmed song checklist, this revision encompasses a new open layout, extra routines and purposes, and extra beneficial properties to assist either scholars and teachers prevail.

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**Additional resources for Algebra for College Students (5th Edition) (MathXL Tutorials on CD Series)**

**Sample text**

Round answers to the nearest tenth of a percent. (a) 1980 (b) 1990 (c) 2000 (d) How has the percent of households investing in mutual funds changed from 1980 to 2000? An Addison-Wesley product. Copyright © 2004 Pearson Education, Inc. 32 CHAPTER 1 Review of the Real Number System 94. 86, where x represents the year. S. ) (a) Use this expression to complete the table. Round answers to the nearest tenth. 8 (b) Describe the trend in the amount of federal spending on education during these years. An Addison-Wesley product.

Which equations are linear equations in x? A. 3x ϩ x Ϫ 1 0 B. 8 x 2 C. 6x ϩ 2 9 D. 1 1 xϪ 0 2 x 2. Which of the equations in Exercise 1 are nonlinear equations in x? Explain why. 3. Decide whether 6 is a solution of 3͑x ϩ 4͒ 5x by substituting 6 for x. If it is not a solution, explain why. 4. Use substitution to decide whether Ϫ2 is a solution of 5͑x ϩ 4͒ Ϫ 3͑x ϩ 6͒ 9͑x ϩ 1͒. If it is not a solution, explain why. 5. The equation 4͓x ϩ ͑2 Ϫ 3x͔͒ 2͑4 Ϫ 4x͒ is an identity. Let x represent the number of letters in your last name.

He gave the solution set as ͞0. Why is this incorrect? 52. Explain the distinction between a conditional equation, an identity, and a contradiction. Decide whether each equation is conditional, an identity, or a contradiction. Give the solution set. See Example 5. 53. Ϫ2p ϩ 5p Ϫ 9 3͑ p Ϫ 4͒ Ϫ 5 54. Ϫ6k ϩ 2k Ϫ 11 Ϫ2͑2k Ϫ 3͒ ϩ 4 55. 6x ϩ 2͑x Ϫ 2͒ 9x ϩ 4 56. Ϫ4͑x ϩ 2͒ Ϫ3͑x ϩ 5͒ Ϫ x 57. Ϫ11m ϩ 4͑m Ϫ 3͒ ϩ 6m 4m Ϫ 12 58. 3p Ϫ 5͑ p ϩ 4͒ ϩ 9 Ϫ11 ϩ 15p 59. 7͓2 Ϫ ͑3 ϩ 4r͔͒ Ϫ 2r Ϫ9 ϩ 2͑1 Ϫ 15r͒ 60.