Matrix Test

Which element is located in A₂₃?

• -3

• 5

• -9

• 2

Find A-B

• -3     1
  7     -1

• 1     0
  1     -4

• -4       0
  6     -1

• not possible because rows do not match columns

Multiply

• 20     15    -10
  30     -5         0

• -20      15     -10
  30     -5          0

• 1        8       3
  11     4        5

• 20     -15     10
  -30         5        0  

What is the location of 5?

• A₁₂

• A₂₁

• A₂₅

• A₁₃

Match each matrix to its correct dimension.

• 3 x 1

• 
• 1 x 3

• 
• 2 x 3

• 
• 4 x 2

• 
• 2 x 4

• 

find: B*A

• 47     30
  9     5

• 17     15
  42     35

• 10     25
  7     1

• not possible because rows do not match columns

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

Find the determinant of the matrix

• A
• B
• C
• D

Evaluate the determinant of the given matrix.

Determine if the matrix has an inverse, if so find it.

• No
•  0   1
  -1   2
• -1   3
    1   -2
•   2   -1
  -1   1