Reviews for Finals 5: Add, Subtract, Multiply Matrices

What are the dimensions of this matrix?

(a)  

Add Matrix A + Matrix B

​ (a)   ​ (b)  

​ (c)   ​ (d)  

​

• 8
• 10
• 1
• 4
• -1
• 0
• -6
• -10
• -4

Can the operation be performed?

• Yes

• No

What comes first in the order?

• Row
• Column

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9

Add the matrices.

​ (a)   ​ (b)  

​ (c)   ​ (d)   ​

• 11
• 8
• -4
• 2
• 10
• 28
• -5
• -8
• 15
• 18

Subtract Matrix A - Matrix B

(a)   ​ (b)  

​ (c)   ​ (d)  

​

• -4
• 0
• 6
• -1
• 4
• -6
• -10

Add

• -2   4   -9
  -1   -6   -17
• -8   12   -9
  1   6   17
• -8   4   -9
  15   6   7
• -2   -4   -9
  15   6    7

What is the name of each individual number in a matrix?

• Row
• Element
• Dimension
• Rectangle

What are the dimensions of this matrix?

• 3x1
• 1x3
• 3x3
• 1x1