# Matrix

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• By: Janiyah Goodman  Trinity Mintze and Tykerria ﻿ Farley
• Matrix Comic Strip﻿
• Matrix A matrix is a rectangular array of numbers, symbols, or expressions arranged in rows and columns.﻿
• Today class where going to talk about matrices and what a Matrix is. As it says on the board...﻿
• Types of Matrix Operations: Addition, Subtraction, and Multiplication. You can also solve Matrices by using inverse. *Note: The numbers in a Matrix are its entries, and the dimensions of a matrix are 2x3 or 3x3. Example:IF your Matrix is a 2x3 the amount of rows you have are 2 and the amount of columns you have are 3. Also there are different types of matrix such as: -Row Matrix- which is a Matrix with only 1 row. -Column Matrix- A Matrix with only 1 column. -Square Matrix- A  Matrix that only has the same number of rows and columns. -Zero Matrix- A matrix whose entries are all zeros. Identity Matrix- A Matrix that has 1's on the main diagonal and Zeros Elsewhere.
• Examples ﻿of adding and subtracting Matrices : [3  6]       [3  6] [4  6]       [4  6]    +               - [2  7]       [2  7] [1  9]       [1  9] =[5  13]    [1  -1]   [5  15]    [3  -3]
• ﻿Today class where going to work on Adding and Subtracting Matrices. Here are some examples on the board.
• Now its your turn [12  -8]                                  [-21    3    0] [0     5]                                   [24  -18  -6] [0     3]                                              -     +                                         [8  -2  -14] [-4   0]                                   [-6  -10 10] [12  -8]                                       =                    [-16 20]﻿ =
• The End﻿
• If you got this then your correct : [8  -8]   [-29  5  14]﻿ [12 -3]   [30 -8 -16] [-16  23]
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