Mid-Year Review: Unit 3 Matrices

What is the size of the matrix below? Always do Rows x Columns.

• 3 x 4

• 4 x 3

Which element is located in A₂₃?

• -3

• 5

• -9

• 2

Match each matrix to its correct dimension.

• 1 x 3

• 
• 3 x 1

• 
• 2 x 3

• 
• 4 x 2

• 
• 2 x 4

• 

These matrices are being multiplied. Determine the dimension/size of the new matrix. 

• Can't multiply them

• 4  x  2

• 3  x  3

• 4  x  3

• 
• 
• 
• 

Perform the indicated operation

• 
• 
• 
• 
• not possible

Perform the indicated operation

• 
• 
• 
• 
• not possible

Perform the following operation

• 
• 
• 
• 
• not possible

Find the product of the matrices.

• A
• B
• C
• D

Find the product of the matrices.

• A
• B
• C
• D