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40 8 109. , 13 Application Exercises 112. 102 - 100 , 52 # 2 - 3 10 , 2 + 3 # 4 114. (12 - 3 # 2)2 The following bar graph shows the target heart rate ranges for four types of exercise goals. The lower and upper limits of these ranges are fractions of the maximum heart rate, 220 - a. Exercises 129–130 are based on the information in the graph. Target Heart Rate Ranges for Exercise Goals Exercise Goal Boost performance as a competitive athlete Improve cardiovascular conditioning Lose weight Improve overall health and reduce risk of heart attack W q E Î R Ï 1 Fraction of Maximum Heart Rate, 220 − a 129.

For example, 4(2x-5)=4 ؒ 2x-4 ؒ 5=8x-20. µ Simplify algebraic expressions. Simplifying Algebraic Expressions The terms of an algebraic expression are those parts that are separated by addition. For example, consider the algebraic expression 7x - 9y + z - 3, which can be expressed as 7x + (-9y) + z + (-3). This expression contains four terms, namely, 7x, -9y, z, and -3. The numerical part of a term is called its coefﬁcient. In the term 7x, the 7 is the coefﬁcient. If a term containing one or more variables is written without a coefﬁcient, the coefﬁcient is understood to be 1.

41. Give an example of a number that is an integer, a whole number, and a natural number. 42. Give an example of a number that is a rational number, an integer, and a real number. Determine whether each statement in Exercises 43–50 is true or false. 43. 45. 47. 49. -13 … - 2 4 Ú -7 -p Ú - p 0 Ú -6 44. 46. 48. 50. -6 7 2 -13 6 - 5 - 3 7 - 13 0 Ú - 13 In Exercises 51–60, rewrite each expression without absolute value bars. 51. |300| 53. |12 - p| 55. |12 - 5| -3 57. |- 3| 59. }-3 ͉ - ͉ -7} 52. |-203| 54.