Concept explainers
To find: the greatest numerical increase in students participating between 2005 and 2010 by using matrices.

Answer to Problem 24PPE
519.
Explanation of Solution
Given:
The weekly sales record below show the number of different colors and models of shoes in two weeks:
Shoe sales, Feb 2-8 | ||
color | Model 73 | Model 84 |
Black | 153 | 79 |
White | 241 | 116 |
Blue | 58 | 32 |
Brown | 95 | 47 |
Shoe sales, Feb 9-15 | ||
color | Model 73 | Model 84 |
Black | 172 | 82 |
White | 278 | 130 |
Blue | 65 | 29 |
Brown | 103 | 54 |
Calculation:
Using matrices to organize the information.
First convert the Feb. 2-8 table into a matrix
Then convert the Feb. 9-15 table into a matrix
Now, add the matrices,
Now, find the largest number and which color and number shoe it corresponds to 519.
Chapter 12 Solutions
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