Final answer:
If M is the midpoint of AB then the coordinates of point B are (8, 18) obtained by using midpoint formula.
Step-by-step explanation:
The midpoint formula for a line segment with endpoints (x1 ,y1 ) and (x 2 ,y 2 ) is given by:
M(x1+x2/2, y1+y2/2)
In this case, you know the coordinates of point A(2,6) and the midpoint M(5,12).
Let's denote the coordinates of point B as (x,y). Using the midpoint formula:
2+x/2 = 5
2+x=10
x=8
6+y/2=12
6+y=24
Subtract 6 from both sides:
y=24-6
y=18
Hence, the coordinates of point B are (8,18).