Matrices Warm-Up

What are the dimensions of this matrix?

• 4x3

• 3x4

• 3

• 4

What comes first in the order?

• Row
• Column

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9

What is the name of each entry of a matrix?

• Row
• Element
• Dimension
• Rectangle

In Matrix R (pictured) what is the value of element R₁₃

• 8
• 9.01
• 3
• 1

In Matrix R (pictured) what is the value of element R₃₂

• 8
• 9.01
• 6
• 1

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

Add.

• No Sum Exists

• 
• 
• 

Subtract

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

Find B-A

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