Matrix Intro Review

• a
• b
• c
• d

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

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

• 8
• 9.01
• 6
• 1

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

• 8
• 9.01
• 3
• 1

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9

Add

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

Find A-B

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

Can the operation be performed?

• Yes

• No

• Sometimes

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

• 8
• 9.01
• 6
• 1