Algebra: Structure And Method, Book 1

(REV)00 Edition Edition

ISBN: 9780395977224

Author: Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher: McDougal Littell

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Weight Lifting Brzyckis formula is used by weight lifters to determine the weight M that is equivalent in a single repetition to n repetitions of a weight w. the formula is M=w1.02780.278n. It applies for up to n=10 repetitions. In this exercise, we consider a weight lifter who bench-presses several repetitions of w=240 pounds. a. What single bench-press weight M corresponds to 5 repetitions of this weight? b. What number of repetitions of this weight corresponds to a single bench press of 278.75 pounds?

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Insurance copayment Carrie had to have 5 fillings done. Each filling cost $80. Her dental insurance required her to pay 20% of the cost as a copay. Calculate Carrie’s copay: (a) First, by multiplying 0.20 by 80 to find her copay for each filling and then multiplying your answer by 5 to find her total copay for 5 fillings. (b) Next, by multiplying [5(0.20)](80) (c) Which of the properties of real numbers says that your answers to parts (a), where you multiplied 5[(0.20)(80)] and (b), where you multiplied [5(0.20)](80), should be equal?

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Further Investigations Use a calculator to simplify each of the following numericals. Express your answers to the nearest hundredth. a 2-3+3-3-2 b 4-3-2-1-2 c 5-3-3-5-1 d 6-2+7-4-2 e 7-3-2-4-2 f 3-4+2-3-3

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