Lesson 6: Organizing Data Using MAtrices
Words to Know
Matrix: a rectangular arrangement of numbers in rows and columns enclosed in brackets
Element: each number in a matrix
Dimension: the number of rows and columns in a matrix, written as rows x columns
Scalar: a constant used to multiple matrices
Scalar Multiplication: multiply each element in the matrix by the scalar
Element: each number in a matrix
Dimension: the number of rows and columns in a matrix, written as rows x columns
Scalar: a constant used to multiple matrices
Scalar Multiplication: multiply each element in the matrix by the scalar
Examples
1. Dimensions of a Matrix
Video
Video
Tips
You cannot add or subtract matrices if they do not have the same dimensions!
When subtracting, watch your signs! If it helps to add the opposite, switch the subtraction to addition, then change EVERY sign in the second matrix.
When subtracting, watch your signs! If it helps to add the opposite, switch the subtraction to addition, then change EVERY sign in the second matrix.
Extra Examples
Click here for additional examples and self check quizzes
Problems of the Day
1. What are the dimensions of the following matrix?
[ 1 0 4 6 7 ]
2. Solve:
[ 1 3 6 ] - [ 2 0 1 ]
[ 1 0 4 6 7 ]
2. Solve:
[ 1 3 6 ] - [ 2 0 1 ]