Add all of the interior angles to 1260. Then you simplify for x. After that you plug in what you found for X in the E expression. 
        
             
        
        
        
56 57 and 58 are the three numbers that work
        
             
        
        
        
X6 – 9x3 + 8 = 0
let u = x^3
u^2 - 9u + 8 = 0 
(u-8)(u-1) = 0
u = 1,8
back substitute 
1 = x^3
8 = x^3
<span>x = 1 , 2</span>
        
             
        
        
        
The correct answers is 43.33%
        
             
        
        
        
There are two black queens in a standard deck, so the probability is 2/52 or 1/26.
If instead you know you pulled a black card from the deck and you’re wondering what the probably is that it’s a queen, then it’s 2/26, since there are still 2 black queens, but only 26 black cards.