MT Ch 3.5 & 3.6 Flashcards by Thomas Reddy

Q

What come first in matrices

A

Rows then columns

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Q

When can’t you add or subtract

A

If aren’t the same dimensions

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Q

What is the scalar

A

The number multiplied outside of the matrix

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Q

Associative property of addition

A

(A+B)+C=A+(B+C)

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Q

Commutative property of addition

A

A+B=B+A

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Q

Distributive property

A

K(A+B)=kA+kB

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Q

Distributive property of subtraction

A

K(A-B)= kA-kB

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Q

In order to multiply must be…

A

Same inner numbers

3X2 2X2

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Q

Associative property of matrix multiplication

A

A(BC)=(AB)C

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Q

Left distributive property

A

A(B+C)=AB+AC

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Q

Right distributive property

A

(A+B)C=AC+BC

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Q

Associative property of scalar multiplication

A

K(AB)=(kA)*B=A(kB)

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