Answer:
-1.647058824
Step-by-step explanation:
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If this problem is expecting you to show a graph photo, then a dependable website for a problem like this would be www.desmos.com. message me if you're not sure how to use it.
        
             
        
        
        
Hey there!
Assuming #1 ….
x + 7x + x = 180°
REWORD
1x + 7x + 1x = 180°
COMBINE the LIKE TERMS
(1x + 7x + 1x) = 180°
8x + 1x = 180°
9x = 180° 
DIVIDE 9 to BOTH SIDES 
9x/9 = 180/9
CANCEL out: 9/9 because it equal 1 
KEEP: 180/9 because it give you the x-value 
NEW EQUATION: x = 180/9 
SIMPLIFY IT! 
x = 20
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Good luck on your assignment & enjoy your day!
~Amphitrite1040:)
 
        
                    
             
        
        
        
X=14
Y=14
Perimeter=56
The reason is because if you see 8 and 6 you can see that the lines are equivalent so I just assumed that the missing lines are 8 and 6. So I added the number up causing x and y to be 14 then for perimeter I simply just multiplied 14x4 which is 56.