Transcript 12-1 Organizing Data Using Marticies

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:
−3
−5 2.7
+
−4
7 −3
−3.9
2
Find the sum or difference:
2
−4
1.5
11
−1
8
3.2 − −6.5 4
−5
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?
4 −1.5
3
1 −6
What is the Product?
−2 −3 7.1 5