Review of Matrices

How many columns are in a 5 x 4 matrix?

• 5

• 4

• 20

• 9

Subtract

• 3    -8
  0   -1

• 3   -4
  8  -13

• -3   8
  0    1

• 3   -8
  -8    1

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

• No

•  0   1
  -1   2

• -1   3
    1   -2

•   2   -1
  -1   1

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

• No

•  0   1
  -1   2

• -1   3
    1   -2

•   2   -1
  -1   1

If the determinant = -2, does it have an inverse?

• YES

• NO

There is NO inverse if the determinant equals what value?

• 0

• 1

• -1

Calculate the determinant

• 0

• none

• -32

• -8

Multiply the matrices

• A

• B

• C

• D

Calculate the determinant

• 0

• none

• -32

• -8

Find the determinant's value

• -18

• -23

• -2

• 2