Matrix Test Review

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

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

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.

Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

Subtract

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

You can multiply a 2X3 matrix by which matrix?

• 2X2
• 2X12
• 3X12
• 2X3

What is a Matrix?

• An equation of over 5 numbers or symbols

• A set of numbers in rows and columns

• A method of finding the n^th value of a series

• A complicated number system

Name the order of this matrix.

• 3x1
• 1x3
• 3
• 1

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9