SOLUTION: in the standard (x,y) coordinate plane, point m with coordinates (5,4) is the midpoint of AB, and B has coordinates (7,3). What are the coordinates of A?

Question 426581: in the standard (x,y) coordinate plane, point m with coordinates (5,4) is the midpoint of AB, and B has coordinates (7,3). What are the coordinates of A?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi

point m with coordinates (5,4) is the midpoint of AB.  Pt B(7,3)

Midpoint Pt(x,y):  ( , )

 (7+ x)/2 = 5 

     x = 3

 (3 + y)/2 = 4

     y = 5 

 Pt A(3,5)

CHECKING our Answer***  (3+7)/2 = 5   and (5+3)/2=4



 

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