SOLUTION: Hi! So I'm having problems with coordinates midpoint formula, midpoint of a segment. Sometimes I can figure them out, and sometimes I'm having HUGE problems like these two question

Question 831382: Hi! So I'm having problems with coordinates midpoint formula, midpoint of a segment. Sometimes I can figure them out, and sometimes I'm having HUGE problems like these two questions, who are actually pretty easy, but for some reasons I also keep getting the wrong answers, like I never get the answers who are listed for the question. It's like. ugh.
1. What is the midpoint of the segment with the endpoints (1, 8) and (�5, 10)?
a. (2, 1)
b. (�2, 1)
c. (�4, 2)
d. (�2, 9)

and here
2. The coordinates of the midpoint of MG are (3, 5). The coordinates of M are (0, 7). Using the midpoint formula of M-(x^1+x^2/2 , y^1+y^2/2) what are the coordinates of G?
a. (6, 3)
b. (�3, 9)
c. (1.5, 6)
d. (0, 0)
I don't know, I guess perhaps a little better explaining would help me?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
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
( 1 , 8 ) ( -5 , 10 )
M(x,y) =

x= -2 ,y= 9
-------------
P(x,y) =

P(x,y)=(2,5)
M=(0,7)
2=(x1+2)/2
4=x1+2
x1=4-2
x1=2
5= y1+7)/2
10=y1+7
y1=10-7
y1=3
G=(2,3)
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