TCI 3 (Matrices)

What is the identity matrix of a 2 x 2 matrix?

• 1 1

  1 1

• 1 0

  0 1

• 0 1

  1 0

• 0 0

  0 0

Tags

CCSS.HSN.VM.C.9

How many columns are in a 5 x 4 matrix?

• 5

• 4

• 20

• 9

Find A - B

• -3     1
  7     -1
• 1     0
  1     -4
• -4       0
  6     -1
• not possible because rows do not match columns

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

Find

• 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

CCSS.HSN.VM.C.6

CCSS.HSA.REI.C.9

CCSS.HSA.REI.C.6

CCSS.HSA.REI.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

In Matrix R (pictured) what element is in the second row, third column?

• 8
• 9.01
• 6
• 1

Tags

CCSS.HSN.VM.C.8

CCSS.HSN.VM.C.6

Given matrices A & B: 
A is a (4x5) matrix
B is a (5x3) matrix
 What are the dimensions of the product of A times B?

• 4x3

• 4x5

• 3x4

• Matrix does not exist

Tags

CCSS.HSN.VM.C.8

CCSS.HSN.VM.C.9

Multiplying A*B produces a 2x2 matrix. Find the Row 1 Column 1 entry of A*B

• 17

• 10

• 47

• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

CCSS.HSN.VM.C.6

Find the product of the matrices.

• A
• B
• C
• D

Tags

CCSS.HSN.VM.C.8