Matrices (singular: matrix, plural: matrices) have many uses in real life. One application would be to use matrices to represent a large amount of data in a concise manner so that we can process the data in various ways more conveniently.
For example, the sales of different types of prepacked food from 3 stalls during a given period of time could be shown in the form of a table here:
Stall A 
Stall B 
Stall C 

Packs of noodles sold 
36 
21 
43 
Packs of rice sold 
27 
56 
35 
This table can be represented as a matrix:
This matrix could then be added with another that represents the sales for a different period of time to get the total for the two periods of time, etc.
The topics covered in these lessons on matrices are:
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