Posted by kate on .
11. The midpoint of is E(–1, 0). One endpoint is C(5, 2). What are the coordinates of the other endpoint?
can someone please explain how to do this problem

math 
Steve,
For the xcoordinate,
C is 6 units to the right of E
For the ycoordinate,
C is 2 units above E
So, since E is the midpoint, the other endpoint is
6 to the left and 2 below E, or (7,2)
Algebraically, you know that if the ends are C and D,
(Cx+Dx)/2 = Ex
(Cy+Dy)/2 = Ey, so
(5+Dx)/2 = 1
(2+Dy)/2 = 0
5+Dx = 2
Dx = 7
2+Dy = 0
Dy = 2
as shown above 
math 
kate,
thank you

math 
mia,
did you use the midpoint formula