Answer:
D) (8, 6)
Step-by-step explanation:
Given: M(9, 8) is the midpoint of RS . The coordinates of S are (10, 10).
Here we have to use the mid-point formula:
Here (x, y) is the midpoint.
(x, y) = M(9, 8)
(x2, y2) = (10, 10)
Here x = 9, y = 8 and x2 = 10 and y2 = 10
Now let's plug in these values in the mid-point formula and find (x1, y1)
Let's simplify and find the value of x1 and y1
So the coordinates of R(8, 6)