Matrix Vocab

• 2x3

• 3x2

• 3x4

• 4x3

What is a₂₃

• 14

• 4

• 1

• 3

Which sums can NOT be made from the following matrices ?

• A+A

• A+C

• B+D

• C+C

Which of the following products can NOT be made from these matrices ?

• AB

• BA

• BC

• BD

If A is a 2 × 3 matrix, and B is a 3 × 4 matrix, how many columns does AB have?

• 2

• 3

• 4

• AB is not defined

What is the dimension of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

What comes first in the dimension?

• Row

• Column

What must be true in order to ADD two matrices?

• They must be square.
• The dimensions must be equal.
• The determinant can't equal 0.
• The column of the 1st must equal the row of the 2nd.

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• undefined/not possible

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