4 by 5 Matrices

What do w, x, y and z equal in this matrix subtraction?

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17

What is the name of each entry of a matrix?

• Row

• Element

• Dimension

• Rectangle

Dimensions?

• a

• b

• c

• d

What must be true in order to ADD two matrices?

• They must be square.

• The dimensions must be equal.

• The determinant can't equal 0.

• The column of the 1st must equal the row of the 2nd.

Match each matrix to its correct dimension.

• 3 x 1

• 
• 2 x 4

• 
• 1 x 3

• 
• 2 x 3

• 
• 4 x 2

• 

What is a Matrix?

• An equation of over 5 numbers or symbols 

• A set of numbers in rows and columns

• A method of finding the n^th value of a series

• A complicated number system

A (a)   describes the size of the matrix by the number of rows and columns.

• dimension

• entry

• array

• matrix

What is a Matrix?

• An equation of over 5 numbers or symbols 

• A rectangular arrangement of numbers

• A method of finding the n^th value of a series

• A complicated number system

• A
• B
• C
• D

How many columns are in a 5 x 4 matrix?

• 5

• 4

• 20

• 9