4B - Adding and Subtracting matrices

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.

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

Given these matrices find A + B

• 
• 
• 
• 

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

Subtract

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

Given these matrices find C - D

• 
• 
• 
• NA

Tags

CCSS.HSN.VM.C.8

Given these matrices find D - A

• 
• 
• 
• NA

What is the value of the variable in the equation?

• 
• 
• 
• 

Tags

CCSS.2.NBT.B.5

Find the values of x, y and z.

• w = 13, x = 4, y = 7, z = 23
• w = 13, x = -4, y = 11, z = 23
• w = 13, x = 4, y = 11, z = 23
• w = 13, x = 4, y = 11, z = 17

Tags

CCSS.3.OA.D.8

CCSS.4.OA.A.3

CCSS.7.EE.B.3

Can the operation be performed?

• Yes

• No

• Sometimes

• only Mrs Newton knows

Tags

CCSS.HSN.VM.C.8