Matrix Addition Subtraction and Scalar

A(n) ____________ is a rectangular arrangement of numbers into rows and columns.

• matrix

• square

• identity

• scalar

In matrix algebra, what do we call a real number?

• constant

• variable

• identity

• scalar

The commutative property holds true for which matrix operation?

• addition

• subtraction

• multiplication

• division

The number of rows by the number of columns is called the __________ of a matrix .

• determinant

• dimensions

• scalar

• order

Which of the matrix operations could NOT be performed? Check all that apply!

• X + Y

• V - X

• Z - W

• (W - Z ) + V

• W + Y - X

Find V + X

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• Does Not Exist

Algebra High cheerleaders are selling sweatshirts for the Football Team. The inventory of sweatshirts as well as sweatshirts sold on A-Days and B-Days are given in the matrices. Which matrix shows the total of sweatshirts sold in each category, color/size, by the cheerleaders?

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Find W + Y + Z

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• 
• 
• Does Not Exist

Find Z - W

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• 
• Does Not Exist

Find Y - (W + Z)

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• Does Not Exist