Matrix Quiz (operations and determinants)

Which of the following is the correct equation to get the determinant of the given matrix?

• 3(2) - 1(5)

• 3(1) - 2(5)

• 3(2) + 1(5)

• 3(1) + 2(5)

Which of the following is the determinant of the given matrix?

• 3

• -3

• -30

• 30

Which of the following is the determinant of the given matrix?

• 52

• -52

• 53

• -53

What are the dimensions of this matrix?

• 4x3

• 3x4

• 3

• 4

• 
• 
• 
• 

Multiply

• 20     15    -10
  30     -5         0
• -20      15     -10
  30     -5          0
• 1        8       3
  11     4        5
• 20     -15     10
  -30         5        0  

Find B-A

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

What is the determinant of this matrix?

• -2

• 2

• 10

• 24

If A is a 2 × 3 matrix, and B is a 3 × 4 matrix, how many columns does AB have?

• 2

• 3

• 4

• AB is not defined

BA=

• Undefined

• 
• 
•