Matrix Multiplication & Inverses

If the matrices can be multiplied, what dimension is the product?

• Multiplication not possible

• 3 x 1

• 1 x 2

• 3 x 2

If the matrices can be multiplied, what dimension is the product?

• 3 x 1

• 3 x 2

• 3 x 3

• Multiplication not possible

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.

Tags

CCSS.HSN.VM.C.8

You can multiply a 2X3 matrix by which matrix?

• 2X2
• 2X12
• 3X12
• 2X3

Tags

CCSS.HSN.VM.C.8

find: B*A

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

Matrix Multiplication is NOT defined for:

• SU
• UT
• SR
• TR

Tags

CCSS.HSN.VM.C.8

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

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

Tags

CCSS.HSA.REI.C.9

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

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

Tags

CCSS.HSA.REI.C.9

Determine whether the matrices are multiplicative inverses.

• Yes

• No

• Not enough information

• I don't know what this means

Find the value of x and y if

• x=2 , y=5

• x=3, y=3

• x=3, y=5

• x=5, y=3