Download Algebra for College Students , Eighth Edition by Jerome E. Kaufmann, Karen L. Schwitters PDF

By Jerome E. Kaufmann, Karen L. Schwitters

Make math a snap with ALGEBRA for students. utilizing daily language and many examples, Kaufman and Schwitters provide help to observe algebra techniques and ace the try. This quantity additionally comes with Interactive Skillbuilder CD-ROM. This application is choked with over eight hours of video guideline to aid all of it make feel. Plus, you will get the robust web-based iLrn Homework application that makes your assignments a breeze. Get the grade you would like with ALGEBRA for students.

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1(x ϩ 2) ϭ Ϫ(x ϩ 2) 5. 3(x ϩ 4) ϭ 3(x) ϩ 3(4) 6. [(17)(4)](25) ϭ (17)[(4)(25)] a. The natural numbers 7. x ϩ 3 ϭ 3 ϩ x b. The integers 8. 3(98) ϩ 3(2) ϭ 3(98 ϩ 2) c. The nonnegative integers 4 3 9. a b a b ϭ 1 4 3 d. The rational numbers e. The irrational numbers For Problems 2 –10, state the property of equality or the property of real numbers that justifies each of the statements. For example, 6(Ϫ7) ϭ Ϫ7(6) because of the commutative property for multiplication; and if 2 ϭ x ϩ 3, then x ϩ 3 ϭ 2 is true because of the symmetric property of equality.

We represent the ■ amount in cents by 5n ϩ 10d. E X A M P L E 1 0 The cost of a 50-pound sack of fertilizer is d dollars. What is the cost per pound for the fertilizer? Solution We calculate the cost per pound by dividing the total cost by the number of pounds. d ■ We represent the cost per pound by . 50 The English statement we want to translate into algebra may contain some geometric ideas. 2 contain some of the basic relationships that pertain to linear measurement in the English and metric systems, respectively.

7 3 1 41. aϪ b ϩ aϪ b 3 4 42. Ϫ 3 3 43. Ϫ Ϫ aϪ b 2 4 5 11 44. Ϫ 8 12 45. Ϫ 2 7 Ϫ 3 9 3 4 47. aϪ b a b 4 5 46. 5 3 ϩ 6 8 5 2 Ϫ aϪ b 6 9 4 1 48. a b aϪ b 2 5 4 1 3 62. Ϫ Ϫ aϪ b 5 2 5 63. Ϫ5 ϩ (Ϫ2)(7) Ϫ (Ϫ3)(8) 25. 0 Ϭ (Ϫ14) 39. 5 7 50. aϪ b Ϭ aϪ b 6 8 64. Ϫ9 Ϫ 4(Ϫ2) ϩ (Ϫ7)(6) 65. 2 3 1 3 aϪ b Ϫ aϪ b a b 5 4 2 5 2 1 1 5 66. Ϫ a b ϩ aϪ b a b 3 4 3 4 69. 3(5 Ϫ 9) Ϫ 3(Ϫ6) 70. 7(8 Ϫ 9) ϩ (Ϫ6)(4) 71. (6 Ϫ 11)(4 Ϫ 9) 72. (7 Ϫ 12)(Ϫ3 Ϫ 2) 73. Ϫ6(Ϫ3 Ϫ 9 Ϫ 1) 74. Ϫ8(Ϫ3 Ϫ 4 Ϫ 6) 75. 56 Ϭ (Ϫ8) Ϫ (Ϫ6) Ϭ (Ϫ2) 76.

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