Introduction Matrices

What is the third element of the first column?

• 1

• -x

• 100

• 3

The order of the above matrix is

If the matrix above is named Q, and PQ = R. This means matrix P has

• 2 rows

• 2 columns

• 1 row

• 1 column

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

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

• 3    -8
  0   -1

• 3   -4
  8  -13

• -3   8
  0    1

• 3   -8
  -8    1

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

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

• 8

• 9.01

• 6

• 1

What is a Matrix?

• An equation of over 5 numbers or symbols 

• A rectangular arrangement of numbers

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

• A complicated number system

What is a₂₃

• 14

• 4

• 1

• 3