Matrices Test

These matrices are being multiplied. Determine the dimension/size of the new matrix.

• Can't multiply them

• 4  x  2

• 3  x  3

• 4  x  3

Find the product of the matrices.

• A

• B

• C

• D

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How many rows are in a 7 x 3 matrix?

• 7

• 3

• 21

• 10

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 is the name of each entry of a matrix?

• Row

• Element

• Dimension

• Rectangle

Find B-A

• -3     1
  7     -1

• 1     0
  1     -4

• -4       0
  6     -1

• not possible because rows do not match columns

Find B-A

• -3 1

  7 -1

• 1 0

  1 -4

• 4 0

  -6 1

• not possible because rows do not match columns

In matrix B, which element is B₂₁

Mathematical Equivalence

OFF

Find the sum

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