College Algebra 9th txtbk

£
11. c 2 4 5
3 2 4
3 6 8
5 11 15
31. 6 7 11
6 4 8 § 41. c 43. £ 18 12 10 § 45. £ 4 7 3§
6 d 4 18 4 d
9 6 12
4 6 24
0 10 4
Student Answer Appendix SA-25
Exercises 7-3
0.2 1.2
31 16
2 25 15
26 15 25
47. £ 2.6 0.6 § 49. £ 61 25 § 53. £ 26 25 45 § 55. 4 18 4 §
73.
1
$33 $26
(A B) c
2 $57 $77 d
0.2 2.2
3 77
2 45 25
2 43 19
This is the average cost of materials and labor for each product at the two plants.
75. Markup 77. (A) $11.80 (B) $30.30
Basic AM/FM Cruise (C) MN gives the labor costs per boat at each plant.
car Air radio control (D) Plant I Plant II
Model A $3,330 $77 $42 $27
Model B £ $2,125 $93 $95 $50 §
Model C $1,270 $113 $121 $52
0 0 2 0 0
1 0 0 0 1
79. (A) A 2 G 0 1 0 2 0 W
1 0 0 0 1
0 0 1 0 0
There is one way to travel from Baltimore to Atlanta with one intermediate connection; there are two ways to travel from Atlanta to Chicago with
one intermediate connection. In general, the elements in A 2 indicate the number of different ways to travel from the ith city to the jth city with one
intermediate connection.
2 0 0 0 2
0 1 0 2 0
(B) A 3 G 0
0
0
1
3
0
0
2
0 W
0
1 0 0 0 1
There is one way to travel from Denver to Baltimore with two intermediate connections; there are two ways to travel from Atlanta to El Paso with
two intermediate connections. In general, the elements in A 3 indicate the number of different ways to travel from the ith city to the jth city with
two intermediate connections.
2 3 2 5 2
1 1 4 2 1
(C) A A 2 A 3 A 4 G 4
1
1
1
3
4
2
2
4 W
1
1 1 1 3 1
It is possible to travel from any origin to any destination with at most three intermediate connections.
81. (A) $3,550 (B) $6,000 (C) NM gives the total cost per town.
Cost/town
(D) NM c $3,550
$6,000 d Berkeley
Oakland
Telephone House
call call Letter
(E) [1 1] N [3,000
Total
1,300 13,000]
(F)
contacts
1
6,500
N £ 1 § c
10,800 d Berkeley
Oakland
1
0 0 1 1 1 0
1 0 0 1 1 0
0 1 2 3 1 2
1 0 2 3 2 2
$11.80 $13.80 One-person boat
MN £ $18.50 $21.60 § Two-person boat
$26.00 $30.30 Four-person boat
83. (A)
0 1 0 1 0 0
1 1 0 2 1 1
6
1
G
W (B) G
W (C) BC G W where C G W
0 0 0 0 0 1
1 1 1 0 0 1
4
1
11.
1 2 1 x 1 1
2x
25. 29. c 4 3
31. 1 1 0§£
x 41. c 1 9
0 1 d
2 § £ 2 §
1 2 dcx 1
d c 2 1 x 2 3
c 2 3
4 5 d x x 2 1 d
1 3x 2 2
2 3 1 x 3 3
0 0 1 1 0 1
1 2 2 2 0 2
9
1
1 1 1 0 0 0
2 2 2 3 2 0
11
1
(D) Frank, Bart, Aaron and Elvis (tie), Charles, Dan
Exercises 7-4
9
10
1
1