MTH212
Unit 3 – Individual Project B
1. Five neighborhoods (
NB
) all want to raise money for a playground for their kids.
The neighborhood that raises the most money will be able to choose the name of the
park. To raise money, they all decide to have a bake sale and sell cookies (
C
), cakes
(
K
), and muffins (
M
). They plan to sell their bake goods on Saturday morning for 3
weeks. Following are the results of the first 2 weeks. The numbers represent the
number of cookies, cakes, and muffins sold.
A.
How much of each item had the neighborhoods sold by the end of the second week?
Use matrices to solve the problem. Final answer must be given in matrix form. Show all
work to receive full credit.
=
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
=
+
30
5
42
28
5
60
54
7
30
48
2
66
42
6
30
12
18
2
3
22
20
8
20
4
1
20
40
36
18
2
5
20
10
24
24
0
2
36
30
24
18
3
3
10
20
B
A
→
30
5
42
28
5
60
54
7
30
48
2
66
42
6
30
5
#
4
#
3
#
2
#
1
#
M
K
C
NB
NB
NB
NB
NB
Name: Oscar Rene Paz Mena
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View Full DocumentB. Which team sold the most items at the end of the second week?
77
93
91
116
78
5
#
4
#
3
#
2
#
1
#
Total
NB
NB
NB
NB
NB
Neighborhood #2 sold the most items (116).
C. By the end of the third week, the totals were as follows:
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 Spring '11
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 Algebra, Elementary algebra, $10, $12, NB, $8

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