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# chapter fourr!

Question | Answer |
---|---|

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.