The equation would be -5+(-12), so the answer would be -17 :)
        
                    
             
        
        
        
D
Divide the whole thing by 2
2(X^2+8x-5)
X^2+8x. =5
Half of 8 is 4 sq it so you add 16
X^2+8x+16= 5+16
(X+4)^2=21
        
                    
             
        
        
        
Circumference = π * d
π=3.14
diameter = 6
3.14 * 6 = 18.84.
The answer is A.
Hope this helped☺☺
        
                    
             
        
        
        
I think it’s pretty interpretative, the reason I didn’t divide 483/2 like you would normally with a triangle, is because there are 2 triangles in a trapezoid. Also you can split the two triangles off the trapezoid because in a trapezoid the train for will awkward be right.