Matrices Dimensions Elements

The order of a matrix is written as

• number of rows x number of columns

• number of columns x number of rows

• a multiple

• a number

Element G₂₂ is

• 1

• 2

• 3

• 4

Element A₁₂ is

• 1

• 2

• 4

• 0

What type of matrix is this?

• Column Matrix

• Row Matrix

• Square Matrix

• Zero Matrix

What type of matrix is this?

• Column Matrix

• Row Matrix

• Square Matrix

• Zero Matrix / Null Matrix

An Identity Matrix is a

• Diagonal Matrix

• Scalar Matrix

• Square Matrix

• All of the above

What are the dimensions of this matrix?

• 4x3

• 3x4

• 3

• 4

What do a, b, c and d equal in this matrix addition?

• a = -1, b = 10, c = 7, d = -11

• a = -1, b = 10, c = -11, d = 7

• a = 10, b = -1, c = 7 , d = -11 

• a = 10, b = -1, c = -11, d = 7

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

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