Transcript (4-2) Adding and Subtracting Matrices

(4-2) Adding and Subtracting
Matrices
Objectives:
To Add and subtract Matrices
To solve certain Matrix equations
Warm-Up:
matrix.
Simplify the elements of each
• You can perform Matrix Addition on matrices with equal
dimensions by adding their corresponding elements.
Statistics Use the data in the table.
a. Write two 2 x 4 matrices to represent the mean verbal and math SAT
scores.
b. Find the combined mean SAT scores for each year
in the table.
Ex 2
Zero Matrix
The additive identity matrix for the set of all m x n matrices
is the Zero Matrix.
Ex 3
Ex 4
Ex 5
Ex 6
A Matrix Equation is an equation in which the variable is a matrix.You
can use the addition and subtraction properties of equality to solve matrix
equations.
ex 7
Ex 8
Ex 9
Equal Matrices are matrices with the same dimensions and equal
corresponding elements.
ex 10
ex 11
Determine whether the two matrices in each pair are equal.
ex 12
ex 13. Solve for x and y
Try This: How would you solve this?
Assignment
Page 178 # 2 - 20
Even
4-3 Matrix Multiplication
• Objective: To multiply a matrix by a
scalar multiple
Ex 13
Ex 14
Ex 15
Ex 16
Additional Assignment
Pg 186 2-10 evens