Matrices and Data Holt Algebra 2

Definitions Matrix is a rectangular arrangement of numbers into rows and columns Dimensions are read row x column Address is read through the location 4/8/2019 4:16 PM 4.1 Matrix Operations

Reading Matrices ROW COLUMN 2 3 2 x 3 How many total rows does it have? How many total columns does it have? What are its dimensions? 3 2 x 3 Row X column

-3 4 -8 2 -8 16

Entering a Matrix into the calculator: Push 2nd x-1 Arrow over to edit, use up and down arrows to select matrix name, enter Enter number of rows, Enter number of columns, Enter each entry followed by enter. 2nd quit to “save” the information in the Matrix 2---enter 2---enter -3--enter 4---enter 2---enter -8---enter

Entering a Matrix into the calculator: Push 2nd x-1 Arrow over to edit, arrow down to B to select matrix name, enter Enter number of rows, Enter number of columns, Enter each entry followed by enter. 2nd quit to “save” the information in the Matrix 2---enter 1---enter -8--enter 16---enter

Using the matrix once it is entered: 2nd x-1 1---enter x-1 ---enter 2---enter enter -1       x = 0 and y = -2

4 -2 3 -2 2 2 5 16 -5 -2 8 4

Entering a Matrix into the calculator: Push 2nd x-1 Arrow over to edit, use up and down arrows to select matrix name, enter Enter number of rows, Enter number of columns, Enter each entry followed by enter. 2nd quit to “save” the information in the Matrix 3---enter 3---enter 4--enter -2---enter 3---enter 2--enter 2--enter 5--enter 8--enter -5--enter -2--enter

Entering a Matrix into the calculator: Push 2nd x-1 Arrow over to edit, arrow down to B to select matrix name, enter Enter number of rows, Enter number of columns, Enter each entry followed by enter. 2nd quit to “save” the information in the Matrix 3---enter 1---enter -2--enter 16---enter 4---enter

Using the matrix once it is entered: 2nd x-1 1---enter x-1 ---enter 2---enter enter -1       x = 5 and y = 8 and z = -2

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