8-1 to 8-3 Matrix Operations

Subtract

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

Tags

CCSS.3.NBT.A.2

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

Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

Tags

CCSS.HSN.VM.C.8

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

Tags

CCSS.HSN.VM.C.6

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

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  

Tags

CCSS.HSN.VM.C.8

Find the product.

• undefined
• -3   16
  17   12
  8   -10
• 3   12 
  -15  -8
  -1   -3

Tags

CCSS.HSN.VM.C.8

CCSS.HSN.VM.C.9

What is the value of element a₂₃?

• 2
• -1
• 6
• 1

Tags

CCSS.HSN.VM.C.8

What, in relation to matrices, is a Scalar?

• A rate-of change-of measurement i.e.
   "5m/s²"
• A scaly pet i.e.
  "A Pygmy Alligator"
• A single value i.e.
  "80"
• Their is no such thing as a scalar i.e. 

Tags

CCSS.HSN.VM.B.5

CCSS.HSN.VM.C.7

The order of a matrix is written as

• number of rows x number of columns

• number of columns x number of rows

• a multiple

• a number