Posted by kate on Friday, August 29, 2014 at 11:07am.
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, Friday, August 29, 2014 at 11:13am
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, Friday, August 29, 2014 at 11:38am
thank you

math  mia, Friday, August 29, 2014 at 12:15pm
did you use the midpoint formula
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