Alg Reason: Chapter 6 Test

Name the dimensions.

• 2 x 4
• 4 x 2
• -2 x 6
• 1

How many columns are in a 
 5 x 4 matrix?

• 5
• 4
• 20
• 9

Identify element a₂₂

• -3
• -4
• 1

Find B-A

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

Add

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

Subtract

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

What comes first in the order?

• Row
• Column
• The Egg
• The Chicken

What is the order of the resulting matrix when we multiply the matrices below?

• 2 X 1

• 2 X 2

• 1 X 2

• It is UNDEFINED.

• undefined

• 
• 
• 

Find -3A

• 
• 
• 
• Does Not Exist