ANSWERS
FOR
2.6
For use with pages 103–107
2.6 Guided Practice
2. 6 and 7, 3x2 and 9x2, 3y
and 4y
4. The distributive property was
completed incorrectly.
7 4x
38. 20 15y
40. 9a 54
42. 24t 2t2
44. 2x2 16x
6. 7y 133
46. 6w2 3w3
8. 4u 8
48. y3 y2
2
3
10. t 16
12. 2; 0.05; 17.55
14. 2x2
16.
Algebra 1 Answer Transparencies
Copyright © McDougal Littell Inc.
36. 7s s2
4x2
4x 8
50. 7y
52. 7 x
54. 4 2a
56.
1
w
9
18. 9w 12 2x2
58. 5x2 7
2.6 Practice and Applications
60. 5b 5
20. true
62. 8 5a
22. false; 913 213
64. 5x 3x2
24. true
66. 10y 8
26. 4w 24
68. 3x3 2x2
28. 28 4m
70. 1.06x 21.2
30. 3r 24
72. A
32. 2x 12
74. 15,897.6 tons
34. 3y y2
76. 5220; 5180
19
ANSWERS
FOR
2.6 (CONT.)
For use with pages 103–107
Algebra 1 Answer Transparencies
Copyright © McDougal Littell Inc.
78.
Input Output
1
240
2
285
3
330
4
375
5
420
6
510
7
555
8
600
9
645
10
690
11
735
12
780
13
825
14
870
15
915
16
960
80. 4x 12
82. 92x 4 18x 36;
84. T 0.15C; Distributive
86. Let C the cost;
C 2x 3000.
88. $3350
90. Sample answer: Let a rec-
tangle have one dimension
x 2 and the other 7.
The area of the rectangle is
x 27. The sum of the
areas of the smaller rectangles is 7x 14.
92. Sample answer: Suppose that
neither x nor y is zero. If
2xy 2x 2y, then
2xy 4xy
2xy 4xy, and
xy
xy
which implies that 2 4.
Clearly this is not true.
(If x 0 or y 0, then
2xy is equal to 2x 2y,
since both are equal to 0.)
18x 36
20
ANSWERS
FOR
2.6 (CONT.)
For use with pages 103–107
2.6 Mixed Review
94.
96.
7
2
2. –63
1
7
6. –3
98. 121
100.
Quiz 2
2
9
102. 4
4
104. 2
23
4. 14
8. 110
10. 7.1t
12. 10b3
14. 43x
16. 8t
18. 20y 10
106. 7
108. 3
110. –12
Algebra 1 Answer Transparencies
Copyright © McDougal Littell Inc.
112. 1
21