Question

M(9, 8) is the midpoint of mc136-1.jpg. The coordinates of S are (10, 10). What are the coordinates of R

Answer 1

to find mid point formula is..

M(x,y)= (x1+x2/2 ,y1+y2/2)

Answer 2

so it will be..

(9,8)=(10+x2/2 ,10+y2/2)

compare both saides coordinates.

9=10+x2/2
=>10+x2=18
=>x2=18-10
=>x2=8

and 8=10+y2/2
=>10+y2=16
=>y2=16-10
=>y2=6

so
points of R=(8,6)