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chapter fourr!

Matrices Matrix with m rows and n columns has dimensions m X n
Equal matrices only equal if they have the same dimensions and their corresponding elements are equal
(x,y) can be read as a 1 X 2 matrix.
Matrix Addition If two matrices A and B have the same dimentions, there sum A + B is the matrix in which each element is the sum of the corresponding elements in A and B
Additon of Matrices is commutatuve. A + B = B + A
Matrix Multiplication If A is an m X n matrix and B is an n X p matrix. Then the product A*B is the mX p matrix whose element in row I and colum j is the product of row I of A and j of B.
Created by: danielle.