Matrix Test

Find A+B

• 8     10
  8      1 
• 12     25
  7     1
• 10     30
  0     1
• can't add two together because the rows dont match columns

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 the product of the two matrices.

• undefined
• -3   16
  17   12
  8   -10
• 3   12 
  -15  -8
  -1   -3

• 
• 
• 
• 

What is the determinant of this matrix?

• -2

• 2

• 10

• 24

What is the formula for the determinant of a 2x2 matrix?

• ad-bc

• ab-cd

• ad+bc

• (a+d)(b+c)

Calculate the determinant

• 0
• -15
• -70
• 10

Find the inverse of the matrix.

• 
• 
• 
• No Inverse Exists

Solve, if possible.

4x - 2y = 2

5x - 2y + z = 7

3x + 4y - z = 3

• x = 1, y = 1, z = 4

• No solution

• Infinitely many solutions

• x = -3, y = -1, z = -1

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

• 8
• 9.01
• 6
• 1