Adding and Subtracting Matrices Answers

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Which of the following illustrates the commutative property of addition?

17 + 4 + 21 = 21 + 21

17 + –17 = 0

17 + 0 = 17

17 + 4 = 4 + 17

Which of the following illustrates the inverse property of addition?

17 + 4 + 21 = 21 + 21

17 + 4 = 4 + 17

17 + 0 = 17

17 + –17 = 0

Which of the following illustrates the closure property of addition of real numbers?

The sum of any two numbers is close to the product of those numbers.

The sum of any two numbers is close to the difference of those numbers.

When you add 1 to a number you get the next closest number.

The sum of any two real numbers is also a real number.

Which of the following statements are always true about matrices?

Two matrices are equal if they are both square matrices.

Two matrices with different sizes cannot be equal.

A 2 x 3 matrix has 2 rows and 3 columns.

Two matrices are equal if their corresponding elements are equal.

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