Answer:
f(x)=x^2+3
f(x+y)=(x+y)^2+3
this is done by replacing x with (x+y)
f(x+y)=x^2+2xy+y^2+3
therefore : f(x+y)= x^2+y^2+2xy+3
 
        
             
        
        
        
We know that
<span>Since a circle is 360 degrees, 
then 
360</span>°-----------> 100%
<span>x </span>°----------> <span>15% 
</span>x=15*360/100-----> x=54°
the answer is
54 degrees
        
                    
             
        
        
        
2 would be the base and 3 will be the square
        
                    
             
        
        
        
7720 + 80x = 3200 + 120x
I think this is correct.  Hope it helps!
        
             
        
        
        
They are supplementary angles. They are located on a straight line, and when added together they will add up to 180 degrees.