Chapter 6 Extra Practice Answers



Chapter 6 Extra Practice Answers

Lesson 6-1

1. 44 2. 103 3. 142

4. 34 5. 23 6. 65

7. 8.24 8. 76 9. 9.53

10. 9 ������ 9 ������ 9 ������ 9; 6,561 11. 2 ������ 2 ������ 2; 8 12. 3 ������ 3 ������ 3 ������ 3 ������ 3; 243

13. 4 ������ 4 ������ 4; 64 14. 6 ������ 6 ������ 6 ������ 6 ������ 6; 7,776 15. 5 ������ 5 ������ 5 ������ 5; 625

16. 8.5 ������ 8.5 ������ 8.5; 614.125 17. 1.3 ������ 1.3; 1.69 18. 7 ������ 7 ������ 7 ������ 7; 2,401

19. 128

Lesson 6-2

1. 16 2. 11 3. 60

4. 6 5. 36 6. 10

7. 24 8. 50 9. 28

10. 14 11. 2 12. 64

13. 0 14. 156 15. 10

16. 18 17. 43 18. 7

19. 20 20. 20 21. 192

22. 31 23. 8 24. 28

Lesson 6-3

1. 4 2. 2 3. 8

4. 11 5. 12 6. 0

7. 16 8. 10 9. 10

10. 48 11. 13 12. 10

13. 7 14. 9 15. 19

16. 1 17. 0 18. 11

19. 10 20. 12 21. 28

22. 14 23. 5 24. 24

Lesson 6-4

1. h = height; h + 7

2. e = the number of exercises; 2e

3. d = the number of DVDs; 3d

4. a = Carlos.’s age; a ������ 2

5. m = the number of miles Carole rode; m ������ 4

6. m = the number of minutes Clare exercised; m + 12

7. b = the number of blocks to the theater; 2b

8. ������ = Lily.’s height; ������ + 4

Course 1 • Chapter 6 Expressions

Lesson 6-5

1. yes; Associative Property

2. no; Division is not commutative.

3. no; 27 · 1 is 27 by the Identity Property.

4. yes; Identity Property of Addition

5. no; Subtraction is not associative.

6. yes; Identity Property of Multiplication

7. yes; Commutative Property

8. no; Division is not associative.

Lesson 6-6

1. 3(20) + 3(4) = 72 2. 8(60) + 8(7) = 536 3. 5(30) + 5(9) = 195

4. 9(40) + 9(8) = 432 5. 4(50) + 4(2) = 208 6. 6(70) + 6(5) = 450

7. 2(3) + 2(0.7) = 7.4 8. 7(4) + 7(0.2) = 29.4 9. 3(5) + 3(0.4) = 16.2

10. 4x + 12 11. 7x + 28 12. 2x + 16

13. 9x + 54 14. 3x + 33 15. 5x + 35

16. 6x + 24 17. 8x + 72 18. 4x + 20

Lesson 6-7

1. 8x 2. 3x 3. 14x

4. 12x 5. 11x 6. 11x

7. 7x + 2 8. 16x + 3 9. 8x + 5

10. 9x + 4 11. 21x + 9 12. 7x + 8

13. 3(7x + 5y) 14. 2(x + 7y) 15. 5(3x + 2y)

16. 6(2x + 3y) 17. 10(x + 3y) 18. 2(3x + 7y)

19. 8(x + 2y) 20. 9(5x + 3y) 21. 6(9x + 8y)

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