Dimensions of Matrices

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

Dimensions?

• a

• b

• c

• d

How many rows are in a 7 x 3 matrix?

• 7

• 3

• 21

• 10

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.

Dimensions?

• a

• b

• c

• d

How many columns are in a 5 x 4 matrix?

• 5

• 4

• 20

• 9

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

You can multiply a 2X3 matrix by which matrix?

• 2X2

• 2X12

• 3X12

• 2X3

If the matrices can be multiplied, what dimension is the product? If not, write undefined.

• undefined

• ( 3 x 1 )

• ( 1 x 2 )

• ( 3 x 2 )

What are the dimensions of this matrix?

• 3x1

• 1x3

• 3x3

• 1x1