matrices fundamental operations quiz

What must be true in order to ADD two matrices?

• They must be square.
• The dimensions must be equal.
• The determinant can't equal 0.
• The column of the 1st must equal the row of the 2nd.

Dimensions?

• a
• b
• c
• d

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  

You can multiply a 2X3 matrix by which matrix?

• 2X2
• 2X12
• 3X12
• 2X3

Element Address?

• a
• b
• c
• d

Find 3B - 2A

• [22 25]

  [17 3]

• [14 5]

  [-11 3]

• [-14 5]

  [11 -3]

• none of these

find: BA

• [47 30]

  [ 9 5 ]

• [17 15]

  [42 35]

• [10 25]

  [ 7 1 ]

• none of these

How is the entry of a matrix identified?

• Row x Column

• Column x Row

• Row only

• Column only

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

What is the value of element a₃₄?

• 2
• -3
• 6
• 1