The equation is simply 8s where s is the length of a side. There are 8 sides. You are just adding the length of all 8 sides together to get the perimeter.
-8.1
Step-by-step explanation:

<em>Times </em><em>all </em><em>by </em><em>9</em><em> </em><em>to </em><em>get </em><em>rid </em><em>of </em><em>fraction</em>
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<em>Take </em><em>2</em><em>1</em><em>.</em><em>6</em><em> </em><em>away</em><em> </em><em>from</em><em> </em><em>both</em><em> </em><em>sides</em>
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<em>Divide</em><em> </em><em>by </em><em>-</em><em>4</em>
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1/4 squared would be 1/4 times 1/4 which would eqaul 0.063
9.5 is your answer if you can do that because 3/2 is 1.5
It A because the two mirror each other so you can simplify them to (3x−5)^2.