CW: Matrices - add/sub/scaler

What do a, b, c and d equal in this matrix addition?

• a = -1, b = 10, c = 7, d = -11
• a = -1, b = 10, c = -11, d = 7
• a = 10, b = -1, c = 7 , d = -11 
• a = 10, b = -1, c = -11, d = 7

Tags

CCSS.HSN.VM.C.8

Can the operation be performed?

• Yes
• No
• Sometimes
• If you flip it the other direction

Tags

CCSS.HSN.VM.C.8

Subtract

• -5
  -8
  3
  10
• -9
  8
  3
  2
• 5
  -8
  3
  10
• -5
  8
  3
  2

Tags

CCSS.HSN.VM.C.8

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

Find A+B

• 8     10
  8      1 
• 12     25
  7     1
• 10     30
  0     1
• can't add two together because the rows dont match columns

Tags

CCSS.HSN.VM.C.8

Solve for matrix X.

• -9

  5

  3

• 9

  13

  -9

• 15

  -5

  3

• 10

  4

  6

Solve for matrix Y.

• -4    9
  -11    9

• 4   -8
  11   8

• 4   -9
  11   9

• -4   9
  11   -9

Tags

CCSS.HSA.REI.C.9

Find X - V

• 
• 
• 
• Does Not Exist

Tags

CCSS.HSN.VM.C.8

• A

• B

• C

• D

Tags

CCSS.HSN.VM.C.8

Simplify.

• 
• 
• 
• 

Tags

CCSS.HSN.VM.C.7