Elements in a Matrix

Perform the indicated operation

• 
• 
• 
• 
• not possible

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

• 8

• 9.01

• 6

• 1

What is the value of element a₂₃?

• 2

• -1

• 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

• A
• B
• C
• D

• A
• B
• C
• D

What many elements are in matrix C?

• 2

• 4

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

• row, column

• column, row