Matrices Quiz I

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

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.

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

In Matrix R (pictured) what element is r₂₃?

• 8
• 9.01
• 6
• 1

What is the name of each entry of a matrix?

• Row
• Element
• Dimension
• Column

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

Find the product.

• ∅

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

You can multiply a 2 x 3 matrix by which matrix?

• 2 x 2

• 2 x 1

• 3 x 12

• 2 x 3

Find A+B

• 8     10 8      1 

• 12     25 7     1

• 10     30 0     1

• ∅