Answer:

Step-by-step explanation:
<u>Step 1: Find the hypotenuse</u>
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Answer: 
Divide 31 by 2 and you will get 15.5
The answer is 14.
(7x+25)+(3x+15)=180
x=14
Given:
The matrix statements in the options.
To find:
The answer choice that show the commutative property does not hold for matrix multiplication.
Solution:
We known that matrix multiplication is not commutative. if A and B are two non-zero matrices, then

Let us assume,

According to the above property of the matrix, we get

Therefore, the correct option is B.