By Laurie Boswell, Timothy D. Kanold, Lee Stiff, Holt Mcdougal

ISBN-10: 0618250182

ISBN-13: 9780618250189

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**Additional info for Algebra**

**Sample text**

1+4 Evaluate power. =5 Add. An exponent applies only to the number, variable, or expression immediately to its left. In the expression 2x 3, the base is x, not 2x. In the expression (2x)3, the base is 2x, as indicated by the parentheses. EXAMPLE 4 Exponents and Grouping Symbols Evaluate the expression when x = 4. a. 2x 3 b. (2x)3 SOLUTION a. 2x3 = 2(43) = 2(64) Evaluate power. = 128 Multiply. b. (2x)3 = (2 • 4)3 10 Substitute 4 for x. Substitute 4 for x. = 83 Multiply within parentheses. = 512 Evaluate power.

26. 102 27. 52 28. 82 29. 6 4 30. 105 31. 7 4 32. 46 33. 93 34. 25 EVALUATING EXPRESSIONS Evaluate the expression for the given value of the variable. STUDENT HELP 35. 4n when n = 5 36. b4 when b = 9 37. x 6 when x = 10 38. c6 when c = 2 39. w 3 when w = 13 40. 5 HOMEWORK HELP Example 1: Example 2: Example 3: Example 4: Example 5: Example 6: 12 Exs. 17–25 Exs. 26–40 Exs. 41–46 Exs. 55–60 Ex. 61 Exs. 63–66 EXPONENTIAL EXPRESSIONS Evaluate the expression for the given values of the variables. 41.

If you save $5 per week, will you have enough money in a year? You write the inequality 5n ≥ 250 to model the situation. What do 5, n, and 250 represent? Solve the inequality. com for help with problem solving in Exs. 69–76. APPLYING FORMULAS In Exercises 69–76, match the problem with the formula needed to solve the problem. Then use the Guess, Check, and Revise strategy or another problem-solving strategy to solve the problem. Area of a rectangle A = lw Distance d = rt Simple interest I = Prt Volume of a cube V = s3 Temperature C = ᎏᎏ(F º 32) Surface area of a cube S = 6s2 5 9 69.

### Algebra by Laurie Boswell, Timothy D. Kanold, Lee Stiff, Holt Mcdougal

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