12-1 Organizing Data Using Matrices

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Presentation transcript:

12-1 Organizing Data Using Matrices

Matrix: is a rectangular arrangement of numbers in rows and columns Size of Matrix: rows × columns Element: Each number in a matrix

Problem 1: Adding or Subtracting Matrices Find the sum or difference: −5 2.7 7 −3 + −3 −3.9 −4 2

Find the sum or difference: 2 11 −4 3.2 1.5 −5 − −1 8 −6.5 4 0 −3

Scalar: the real-number you multiply a matrix by in order to solve problems Scalar Multiplication: When you multiple a matrix by a scalar When using scalar multiplication, multiply each element in the matrix by the scalar

Problem 2: Multiplying a Matrix by a Scalar What is the product? 3 4 −1.5 1 −6

What is the Product? −2 −3 7.1 5