Matrices

Which of the following matrices is a 3x3 identity matrix?
1. $quiz8-1a.jpg$
2. $quiz8-1b.jpg$
3. $quiz8-1c.jpg$
4. Not Here
What is the augmented matrix of the following system of equations?
$quiz8-2quest.jpg$
1. $quiz8-2a.jpg$
2. $quiz8-2b.jpg$
3. $quiz8-2c.jpg$
4. Not Here
Add the following matrices.
$quiz8-3quest.jpg$
1. $quiz8-3a.jpg$
2. $quiz8-3b.jpg$
3. $quiz8-3c.jpg$
4. Not Here.
Add the following matrices.
$quiz8-4quest.jpg$
1. $quiz8-4a.jpg$
2. $quiz8-4b.jpg$
3. $quiz8-4c.jpg$
4. Not Here.
Subtract the following matrices (A-B).
$quiz8-5quest.jpg$
1. $quiz8-5a.jpg$
2. $quiz8-5b.jpg$
3. $quiz8-5c.jpg$
4. Not Here.
Subtract the following matrices (A-B).
$quiz8-4quest.jpg$
1. $quiz8-6a.jpg$
2. $quiz8-6b.jpg$
3. $quiz8-6c.jpg$
4. Not Here
Multiply the following matrices (A x B).
$quiz8-3quest.jpg$
1. $quiz8-3b.jpg$
2. $quiz8-7b.jpg$
3. $quiz8-3c.jpg$
4. Not Here
Multiply the following matrices (A x B).
$quiz8-4quest.jpg$
1. $quiz8-8a.jpg$
2. $quiz8-8b.jpg$
3. $quiz8-8c.jpg$
4. Not Here.
Find the inverse of the following matrix.
$quiz8-9quest.jpg$
1. $quiz8-9a.jpg$
2. $quiz8-9b.jpg$
3. $quiz8-9c.jpg$
4. Not Here
Solve the following system of equations using the inverse.
x+y=3
20x-5y=10
1. x= $1neg.jpg$ 1, y=2
2. x=1, y=2
3. No Solution
4. Infinite Number of Solutions.