Multiplying matrices

•  $\left[-3\ -5\right]$  

•  $\left[-5\ -3\right]$  

•  $\left[5\ \ -4\right]$  

• Undefined

Is this matrix multiplication defined?

• Yes

• No

Can matrices with different dimensions be multiplied?

• Yes

• No

• 
• 
• undefined/not possible

• 

Let P= MN. Which of the following is $p_{2,1}$   

• 46

• 38

• 27

• 12

Multiply

• A

• B

• C

• D

Determine the dimension of the resulting matrix.

• 4 x 4

• 2 x 2

• 2 x 4

• not possible because rows do not match columns

Perform the indicated operation using the Desmos calculator. If it’s not possible, select Not Possible.

• 7

  -7

  -6

  20

• 7

  -9

  -6

  20

• Not Possible

• 7

  -9

  2

  20

Which of these is NOT defined

• MP
• PM
• MN
• QP

Multiply

• undefined

• 
• 
•