Download 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
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
+ 12
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)