Matrices Practice

Dimensions?

• a

• b

• c

• d

find: B*A

• 47     30
  9     5

• 17     15
  42     35

• 10     25
  7     1

• not possible because rows do not match columns

Are these matrices inverses of each other?

• Yes

• No

• Unable to Determine

Which option below correctly shows the steps to find the inverse of this matrix?

• 
• 
• 
• No Inverse Exists

Find the determinant of the matrix

• A

• B

• C

• D

Evaluate the determinant of the matrix.

• -21

• 0

• 9

• 12

Evaluate the determinant of the matrix.

• -21

• 0

• 9

• 12

What is the determinant of this matrix?

• 0

• 24

• -24

• -12

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

• No

•  0   1
  -1   2

• -1   3
    1   -2

•   2   -1
  -1   1

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