Question 431339
 If the coordinates of A and B are ( x1, y1) and ( x2, y2) respectively, then the midpoint, M, of AB is given by the following formula 														
(10,-10	)(9,-9)   					
M ={{{(x1+x2)/2}}}{{{(y1+y2)/2}}}							
x= (10+	9)/2  y=(-10+9)/2	
x= 	9.5		y=	-0.5