Test Review of Matrix

Evaluate the value of det (G).

• 8

• -8

• 18

• -18

What is A^-1?

• 
• 
• 
• 

How many rows are in a 7 x 3 matrix?

• 7

• 3

• 21

• 10

In Matrix R (pictured) what is the value of element R_3,2

• 8

• 9.01

• 6

• 1

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

You can multiply a 2X3 matrix by which matrix?

• 2X2

• 2X12

• 3X12

• 2X3

Multiply

• 1   2
  6   -8

• -3   -5
  -5   -11

• -2     8
  -6   -12

• 2  -3
  5   -2

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  

Is matrix D invertible?

• 15

• 5

• 0

• -5

Determine whether the matrices are multiplicative inverses.

• Yes

• No

• Elevator

• Pi