Act Algebra 2 Review

Multiply the following matrices

• 
• 
• 
• 

What are the dimensions of this matrix?

• a

• b

• c

• d

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

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

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

Subtract

• -5
  -8
  3
  10

• -9
  8
  3
  2

• 5
  -8
  3
  10

• -5
  8
  3
  2

In Matrix R (pictured) what element is in the second row, third column?

• 8

• 9.01

• 6

• 1

Perform the indicated operation

• 
• 
• 
• 
• not possible

Find the determinant of the matrix

• A

• B

• C

• D