Addition and Subtraction of Matrices

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

What must be true in order to ADD two matrices?

• They must be square matrices

• The matrices must have the same order.

• The determinant can't equal 0.

• The column of the 1st must equal the row of the 2nd.

Tags

CCSS.HSN.VM.C.8

What is the order of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

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

• 8
• 9.01
• 6
• 1

What is the value of the variable in the equation?

• 
• 
• 
• 

Tags

CCSS.HSA.REI.C.9

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

Find B-A

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

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 values of x and y make the equation true?

• x = 5

  y = -2

• x = 3

  y = -5

• x = 9

  y = 10

• x = 16

  y = -5

Tags

CCSS.HSA.REI.C.8