Operations of Matrices

If the matrices can be multiplied, what are the dimensions of the product?

• Matrix multiplication is not possible.

• 3 x 1

• 1 x 2

• 3 x 2

What do a, b, c and d equal in this matrix addition?

• a = -1, b = 10, c = 7, d = -11

• a = -1, b = 10, c = -11, d = 7

• a = 10, b = -1, c = 7 , d = -11 

• a = 10, b = -1, c = -11, d = 7

• 14

• 15

• 16

• 17

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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

Multiply using the Dot Product

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Find the value of x and y if they are equal matrices.

• x=2 , y=5

• x=3, y=3

• x=3, y=5

• x=5, y=3

a₂₃ + a₁₂ - a₃₁ + a₄₃?

• -2

• -1

• -3

• 0

Perform the indicated operation

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• not possible

Perform the indicated operation

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• 
• not possible