Answer:
You paid $92
Step-by-step explanation:  
you convert 15% to a decimal which wold be .15 then you multiply 80 by .15  and get 12 then you add 12 to the 80 and get 92 so the bill would be $92
 
        
             
        
        
        
A median of a triangle is a segment joining any vertex of the triangle to the midpoint of the opposite side. All triangles have three medians, which, when drawn, will intersect at one point in the interior of the triangle called the centroid. The centroid of a triangle divides the medians into a 2:1 ratio.
        
             
        
        
        
Answer:
{x,y}={1,−3}
Step-by-step explanation: