The simplified expression of
is 
<h3>How to simplify the expression?</h3>
The expression is given as:

Divide 162 and 2 by 2

Take the square root of 81

Apply the quotient rule of indices

Evaluate the difference

Take the square root of x^18

Hence, the simplified expression of
is 
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Answer:
For number 3 the answer is -4
Answer:
<h2>A.221.7</h2>
Step-by-step explanation:
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Any monomial without a written exponent has a degree of 1.
Answer:
It is D (-23, -7, 5, 9, 190)
Step-by-step explanation:
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