By Jerome E. Kaufmann, Karen L. Schwitters
Kaufmann and Schwitters have outfitted this text's popularity on transparent and concise exposition, a number of examples, and considerable challenge units. This conventional textual content continually reinforces the subsequent universal thread: research a ability; perform the ability to aid resolve equations; after which practice what you may have discovered to resolve program difficulties. this straightforward, elementary process has helped many scholars take hold of and observe basic challenge fixing abilities invaluable for destiny arithmetic classes. Algebraic rules are built in a logical series, and in an easy-to-read demeanour, with out over the top vocabulary and formalism. The open and uncluttered layout is helping retain scholars considering the recommendations whereas minimizing distractions. difficulties and examples reference a large variety of themes, in addition to occupation parts resembling electronics, mechanics, and future health, displaying scholars that arithmetic is a part of lifestyle. The text's source package--anchored via more advantageous WebAssign, an internet homework administration tool--saves teachers time whereas additionally delivering extra aid and skill-building perform for college kids outdoor of sophistication.
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Extra info for Algebra for College Students (9th Edition)
6 ϩ (Ϫ2)] ϩ 4 ϭ 6 ϩ [(Ϫ2) ϩ 4] 2. x(3) ϭ 3(x) 20. (14)(25)(Ϫ13)(4) 21. 17(97) ϩ 17(3) 22. Ϫ86[49 ϩ (Ϫ48)] 23. 14 Ϫ 12 Ϫ 21 Ϫ 14 ϩ 17 Ϫ 18 ϩ 19 Ϫ 32 24. 16 Ϫ 14 Ϫ 13 Ϫ 18 ϩ 19 ϩ 14 Ϫ 17 ϩ 21 3. 42 ϩ (Ϫ17) ϭ Ϫ17 ϩ 42 25. (Ϫ50)(15)(Ϫ2) Ϫ (Ϫ4)(17)(25) 4. 1(x) ϭ x 26. (2)(17)(Ϫ5) Ϫ (4)(13)(Ϫ25) 5. Ϫ114 ϩ 114 ϭ 0 6. (Ϫ1)(48) ϭ Ϫ48 For Problems 27 – 54, simplify each of the numerical expressions. (Objective 2) 7. Ϫ1(x ϩ y) ϭ Ϫ(x ϩ y) 27. 23 Ϫ 33 28. 32 Ϫ 24 29. Ϫ52 Ϫ 42 30. Ϫ72 ϩ 52 8. Ϫ3(2 ϩ 4) ϭ Ϫ3(2) ϩ (Ϫ3)(4) 9.
A retailer of sporting goods bought a putter for $18. He wants to price the putter to make a profit of 40% of the selling price. What price should he mark on the putter? 4s can be used to determine that the putter should be sold for $30. Throughout this text, we develop algebraic skills, use these skills to help solve equations and inequalities, and then use equations and inequalities to solve applied problems. In this chapter, we review and expand concepts that are important to the development of problem-solving skills.
1 59. 4 60. 2 61. 1 62. 2pr 2 63. 2pr 2 ϩ 2prh, 31. 3(2x Ϫ 1) Ϫ 4(x ϩ 2) Ϫ 5(3x ϩ 4) 34. 4(Ϫx Ϫ 1) ϩ 3(Ϫ2x Ϫ 5) Ϫ 2(x ϩ 1) Evaluate the algebraic expressions in Problems 35– 57 for the given values of the variables. (Objective 2) 35. 3x ϩ 7y, x ϭ Ϫ1 and y ϭ Ϫ2 36. 4 • Algebraic Expressions For Problems 64–78, translate each English phrase into an algebraic expression and use n to represent the unknown number. (Objective 3) 64. The sum of a number and 4 65. A number increased by 12 35 85. The quotient of two numbers is 8, and the smaller number is y.