Matrices - quick check

What are the dimensions of matrix B?

• 2 x 3

• 3 x 2

• -8 x 10

• 3 x 3

• 8

• 6

• -5

• 5

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What is the name of each entry of a matrix?

• Row
• Element
• Dimension
• Rectangle

Complete the statement below:

Entries (or elements) in a matrix are determined by their _____ position.

• row, column

• column, row

Find B-A

• -3     1
  7     -1
• 1     0
  1     -4
• 4       0
  -6     1
• not possible because rows do not match columns

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 do w, x, y and z equal in this matrix subtraction?

• w = 13, x = 4, y = 7, z = 23
• w = 13, x = -4, y = 11, z = 23
• w = 13, x = 4, y = 11, z = 23
• w = 13, x = 4, y = 11, z = 17

Subtract

• -5
  -8
  3
  10
• -9
  8
  3
  2
• 5
  -8
  3
  10
• -5
  8
  3
  2