Matrix Properties

What is the value of the variable in the equation?

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What is the name of each entry of a matrix?

• Row

• Element

• Dimension

• Rectangle

Find B-A

• -3     1
  7     -1

• 1     0
  1     -4

• -4       0
  6     -1

• not possible because rows do not match columns

In Matrix R (pictured) what element is in the second row, third column?

• 8

• 9.01

• 6

• 1

Find A+B

• 8     10
  8      1 

• 12     25
  7     1

• 10     30
  0     1

• can't add two together because the rows dont match columns

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

• A
• B
• C
• D

Find the product. (ignore the fact that I couldn't put matrix brackets in the answers)

• undefined

• -3 16

  17 12

  8 -10

• 3 12

  -15 -8

  -1 -3

is a 2x3 matrix.

is a 2x5 matrix.

Determine whether the matrix product of [A]*[B] is defined. If so, what are the dimensions of the product?

• undefined

• 2x5

• 3x5

• 2x3

find: B*A

• 47     30
  9     5

• 17     15
  42     35

• 10     25
  7     1

• not possible because rows do not match columns