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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 pre-packed 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:
Describing Matrices
Equal Matrices
Types of Matrices
Addition and Subtraction of Matrices
Scalar Multiplication of Matrices
Multiplying Two Or More Matrices (includes video)
Determinant and Inverse of a Matrix
Solving Simultaneous Equations Using Matrices
Representing Information Using Matrices
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