Introduction to Matrices Eric Hoffman Algebra II PLHS Nov. 2007

Key Topics Matrix: a rectangular array of variables or constants in horizontal ROWS and vertical COLUMNS Element: each value in a matrix is called an element A matrix can be described by its dimensions: an “ m X n” matrix has m rows and n columns

Key Topics Row matrix: a matrix that is made up of only one row Column matrix: a matrix that is made up of only one column Square matrix: matrix that has the same number of columns as rows Zero matrix: matrix in which every element is 0

Key Topics Equal matrices: matrices are considered equal if and only if they have the same dimensions and the same elements in corresponding positions

Key Topics

Key Topics Solving Matrices: if the matrices are equal, the corresponding elements are equal

Homework: Pg. 156 10 – 30 even 11 problems