Matrix Writing

What is the name of each entry of a matrix?

• Row

• Element

• Dimension

• Rectangle

In Matrix R (pictured) what is the value of element R_3,2

• 8

• 9.01

• 6

• 1

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

A _____ is a rectangular arrangement of numbers.

• matrix

• dimension

• coefficient

• system

find: B*A

• 47     30
  9     5

• 17     15
  42     35

• 10     25
  7     1

• not possible because rows do not match columns

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

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

Multiply

• 1   2
  6   -8

• -3   -5
  -5   -11

• -2     8
  -6   -12

• 2  -3
  5   -2

Name the order of this matrix.

• 6x2

• 2x6

• 12

• 36

In Matrix R (pictured) what element is r₂₃?

• 8

• 9.01

• 6

• 1