Intro to Matrices Practice

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 the entry at r₃₁?

• 3

• 1

• 4

• 7

Which sums can NOT be made from the following matrices ?

• A+A

• A+C

• B+D

• C+C

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• 
• Not enough info

Find the product of the two matrices.

• 1   2
  6   -8

• -3   -5
  -5   -11

• -2     8
  -6   -12

• 2  -3
  5   -2

• A
• B
• C
• D

Perform the operation if possible.

• A

• B

• C

• D

What are the dimensions of matrix B?

• 2 x 3

• 3 x 2

• -8 x 10

• 3 x 3

What are the dimensions of matrix E?

• 2 x 3

• 4 x 2

• 2 x 4

• -2 x 10

Given these matrices find C - D

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• 
• 
• NA