Introduction to Matrices

A matrix having 36 elements cannot have order

• 9x4

• 6x6

• 8x3

• 36x1

A Matrix is ______________________

• An arrangement of elements in Rows

• An arrangement of elements in Columns

• An arrangement of elements in Rows and Columns

• An ordered arrangement of elements in Rows and Columns

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.

What is the value of element a₃₄?

• 2

• -3

• 6

• 1

What comes first when listing the size of a matrix?

• Row

• Column

Name the dimensions

• 3x1

• 1x3

• 3

• 1

Subtract

• -5
  -8
  3
  10

• -9

  8

  3

  2

• 5

  -8

  3

  10

• -5

  8

  3

  2

What is the second element of the second column?

• -10

• 8

• 25

• 3

How many rows does the above matrix have?

• 1

• 3

The matrix above is named A. AB is possible only if B has

• 1 row

• 1 column 

• 3 rows

• 3 columns