Matrices Quiz Review

How many rows and columns does the matrix have?

• 2 Rows, 2 Columns

• 3 Rows, 2 Columns

• 2 Rows, 3 Columns

• 3 Rows, 4 Columns

What is the entry of the 2nd Row, 1st Column?

• 2

• 5

• 3

• 4

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.7

• 
• 
• 
• 

Tags

CCSS.HSN.VM.C.8

Subtract

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

Tags

CCSS.HSN.VM.C.8

Calculate the determinant

• 0
• none
• -32
• -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

• -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

Calculate the determinant

• 0
• -15
• -70
• 10

Given matrices A and B what is 3A - 4B?

• 
• 
• 
•