Answer:
(4, 5)
Step-by-step explanation:
Using the midpoint formula and equating x to 5 and y to 7, that is the coordinates of the midpoint M
let the coordinates of R be (x, y), then
0.5(x + 6) = 5 ( multiply both sides by 2 )
x + 6 = 10 ( subtract 6 from both sides )
x = 4
Similarly
0.5(y + 9) = 7 ( multiply both sides by 2 )
y + 9 = 14 ( subtract 9 from both sides )
y = 5
Thus coordinates of R = (4, 5 )
