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Answer Key Practice B 1. 2. 3. 4. 5. 6. 7. 81 8. 9. 32 10. 5 11. 8 12. 13. 15 14. 32 15. 16. 15 17. 7 18. 28 19. 20. 9 21. 12 22. 2 23. 2 24. 2 25. 4 26. 2yx y; 30 27. 1 2x4x 1; 75 28. 8.95x 29.95; $65.75 29. 6.95x 24.995 x; $70.83 30. $270; $415 5 8 64 24 3 2 n 4b2 2a2 2y3 x 7 3 94 a5
Lesson 1.2 LESSON 1.2 28 Algebra 2 Chapter 1 Resource Book NAME _________________________________________________________ DATE ___________ Practice B For use with pages 11–17 Write the expression using exponents. 1. a a a a a 2. 9999 3. xxx 4. 2y 2y 2y 7 5. 4b 4b 2a 2a 6. 8 to the nth power Evaluate the expression. 7. 8. 9. 10. 11. 12. 13. 14. 15. 5 23 2 3 1 9 6 2 5 23 1 3 2 3 4 2 2 3 2 1 4 14 7 5 1 5 26 34 Evaluate the expression for the given value of x. 16. when 17. when 18. x when x 4 2 x2 x x 5 3x 0.5x 1 x 3 3x 19. when 20. when 21. 6 x when x 2 3 2x 1 x x 5 25x 3 8 x 3 x Evaluate the expression for the given values of x and y. 22. when and 23. 2y when x 2 and y 1 3 2x y x 3 y 2 5x 3 y 2 24. when and 25. when x 1 and y 4 3 3x y x 3 y 1 2x 1 2x y Write an expression for the area of the figure. Then evaluate the expression for the given value(s) of the variable(s). 26. x 2 and y 3 27. x 6 x y 2y 28. Photography Studio A photography studio advertises a session with a sitting fee of $8.95 per person. The standard package of pictures costs $29.95. Write an expression that gives the total cost of a session plus the purchase of one standard package. Evaluate the expression if a family of four purchases this package. 29. Books You want to buy either a paperback or hard covered book as a gift for 5 friends. Paperbacks cost $6.95 each and hard covered books cost $24.99 each. Write an expression for the total amount you must spend. Evaluate the expression if 3 of your friends get a paperback. 30. Weekly Earnings For 1980 through 1990, the average weekly earnings (in dollars) for workers in the United States can be modeled by E 14.5t 270, where t is the number of years since 1980. Approximate the average weekly earnings in 1980 and 1990. x 4x 1 Copyright © McDougal Littell Inc. All rights reserved.
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Answer Key 59. 0, 2; up; 60. 0, 4;
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Lesson 3.1 LESSON 3.1 14 Algebra 2
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Answer Key Cumulative Review 1. 2.
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Review and Assess CHAPTER 5 Cumulat
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Review and Assess CHAPTER 10 CONTIN
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CHAPTER 10 NAME ___________________
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Answer Key Test C 1. 2. 162 12.7;
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Review and Assess CHAPTER 10 Cumula
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CHAPTER 11 NAME ___________________
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Answer Key Test B 1. arithmetic; d
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CHAPTER 11 NAME ___________________
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Lesson 13.6 LESSON 13.6 Solve ABC.
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CHAPTER 14 NAME ___________________
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