Matrix Operations

What must be true in order to ADD two matrices?

• They must be square.

• Their dimensions must be equal.

• The number of columns of the 1st must equal the number of rows of the second.

• The number of rows of the 1st must equal the number of columns of the second.

What must be true in order to MULTIPLY two matrices?

• They must be square.

• Their dimensions must be equal.

• The number of columns of the 1st must equal the number of rows of the second.

• The number of rows of the 1st must equal the number of columns of the second.

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• undefined

is a 2x3 matrix.

is a 2x5 matrix.

Determine whether the matrix product of [A]*[B] is defined. If so, what are the dimensions of the product?

• undefined

• 2x5

• 3x5

• 2x3

is a 5x3 matrix.

is a 3x5 matrix.

Determine whether the matrix product of [B]*[A] is defined. If so, what are the dimensions of the product?

• undefined

• 3x3

• 5x5

• 3x5

You can multiply a 2x3 matrix by which of the following matrices?

Select all that apply.

• 2x3

• 2x5

• 3x5

• 3x2

Complete Question #1 from the "Matrices Quizizz 1" Handout.

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Complete Question #2 from the "Matrices Quizizz 1" Handout.

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Complete Question #3 from the "Matrices Quizizz 1" Handout.

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Complete Question #4 from the "Matrices Quizizz 1" Handout.

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