By John Coburn, J.D. (John) Herdlick

3 parts give a contribution to a subject sustained during the Coburn-Herdlick sequence: that of laying a company starting place, construction a superior framework, and offering powerful connections. within the Graphs and types texts, the authors mix their intensity of expertise with the conversational sort and the wealth of purposes that the Coburn-Herdlick texts became recognized for. by way of combining a graphical method of challenge fixing with algebraic tools, scholars methods to relate their mathematical wisdom to the surface global. The authors use know-how to unravel the extra true-to lifestyles equations, to interact extra purposes, and to discover the extra monstrous questions related to graphical habit. taking advantage of the suggestions of hundreds and hundreds of teachers and scholars around the nation, collage Algebra: Graphs & versions emphasizes connections with a purpose to increase the extent of pupil engagement in arithmetic and raise their probabilities of luck in collage algebra. The release of the Coburn/Herdlick Graphs and types sequence offers an important breakthrough when it comes to on-line path administration with McGraw-Hill’s new homework platform, attach Math Hosted through ALEKS Corp. Math teachers served as electronic members to settle on the issues that might be to be had, authoring every one set of rules and offering stepped out strategies that cross into nice element and are inquisitive about components the place scholars regularly make errors. From there, the ALEKS company reviewed each one set of rules to make sure accuracy. A unifying subject matter during the complete approach was once the involvement of the authors. via every one step, they supplied suggestions and assistance to the electronic individuals to make sure that the content material being constructed digitally heavily matched the textbook. the result's an internet homework platform that offers greater content material and suggestions, permitting scholars to successfully research the fabric being taught.

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**Additional info for College Algebra: Graphs & Models**

**Example text**

Properties of Real Numbers While the phrase, “an unknown number times five,” is accurately modeled by the expression n5 for some number n, in algebra we prefer to have numerical coefficients precede variable factors. When we reorder the factors as 5n, we are using the commutative property of multiplication. A reordering of terms involves the commutative property of addition. The Commutative Properties Given that a and b represent real numbers: ADDITION: a ϩ b ϭ b ϩ a MULTIPLICATION: a # b ϭ b # a Terms can be combined in any order without changing the sum.

Terms, Coefficients, and Algebraic Expressions An algebraic term is a collection of factors that may include numbers, variables, or expressions within parentheses. Here are some examples: (a) 3 (b) Ϫ6P (d) Ϫ8n2 (c) 5xy (f ) 21x ϩ 32 (e) n If a term consists of a single nonvariable number, it is called a constant term. In (a), 3 is a constant term. Any term that contains a variable is called a variable term. We call the constant factor of a term the numerical coefficient or simply the coefficient.

4x Ϫ 2y 42. 5x Ϫ 3y 43. Ϫ2x2 ϩ 3y2 44. Ϫ5x2 ϩ 4y2 45. 2y2 ϩ 5y Ϫ 3 46. 3x2 ϩ 2x Ϫ 5 47. Ϫ213y ϩ 12 48. Ϫ312y ϩ 52 49. 3x2y 50. 6xy2 51. 1Ϫ3x2 2 Ϫ 4xy Ϫ y2 52. 1Ϫ2x2 2 Ϫ 5xy Ϫ y2 53. 12x Ϫ 13y 55. 13x Ϫ 2y2 57. 54. 32x Ϫ 12y 2 Ϫ12y ϩ 5 Ϫ3x ϩ 1 59. 1Ϫ12y # 4 56. 12x Ϫ 3y2 58. 2 12x ϩ 1Ϫ32 Ϫ3y ϩ 1 60. 7 # 1Ϫ27y Evaluate each expression for integers from ؊3 to 3 inclusive. Verify results using a graphing calculator. What input(s) give an output of zero? 61. x2 Ϫ 3x Ϫ 4 62. x2 Ϫ 2x Ϫ 3 63. Ϫ311 Ϫ x2 Ϫ 6 64.