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miller_introductory_algebra_3e_ch1_3

Section 1.5 Multiplication and Division of Real Numbers 91 Skill Practice Simplify. 23. 100 331 12 622 4 020 25 0 Skill Practice Given a 7 ,evaluate the expressions. 24. a2 25. a2 Answers 23. 11 24. 49 25. –49 Applying the Order of Operations Example 6 Simplify. Solution: 24 233 15 8242 Simplify numerator and denominator separately. Simplify within the inner parentheses and absolute value. Simplify within brackets, Simplify the absolute value. Simplify exponents. Perform multiplication before subtraction. Reduce to lowest terms. 2 012 3 0 24 233 15 8242 2 012 3 0 Evaluating an Algebraic Expression 24 21362 2192 24 72 18 48 18 or Example 7 8 3 Given y 6, evaluate the expressions. a. y2 b. y2 Solution: a. When substituting a number for a variable, use parentheses. Substitute Square , that is, b. y2 1 22 1622 y 6. 36 6 162162 36. When substituting a number for a variable, use parentheses. Substitute Square y2 1 22 1622 y 6. 1362 6. 36 Multiply by 1. 3 4. 24 23642 2192 24 233 13242 2 09 0 Classroom Example: p. 95, Exercise 118 Classroom Example: p. 95, Exercise 120


miller_introductory_algebra_3e_ch1_3
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