Matrices NamingCalculatorApplication

Making & Naming a Matrix Matrix A

Matrix A is called a “Two by Three” “2 x 3” Rows first, Columns next You have to R ow your boat before you can C ome The 2 x 3 is called DIMENSIONS

What are the dimensions of Matrix C? 3 x 2 3 Rows 2 Columns

ADDRESS: Row 3, Column 2

Continuing in the Calc

Multiplying Matrices Columns in A = 3 Rows in B = 3 MULTIPLY! Columns in C = 2 Rows in D = 3 do NOT multiply !

Solving Systems Using Matrices THE BASICS: THE BASICS: If 2x = 10 Then (1/2)2x = 10 (1/2) x = 5 We took the reciprocal or inverse of 2 to solve the equation. Special button on calculator

Using the Calculator Matrix A is a 2 x 2 Matrix B is a 2 x 1 Solve for x by taking the inverse of A (use the special button!)

Putting it together

x is -7 and y is 15

Example

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