Question

The midpoint of SR is M(5,-2). One endpoint is S(-1,3).

Find the coordinates of endpoint R.
A. R(11,–7)
B. R(2, 1)
C. R(
6-5)
D. R(2,0.5)
wer 1.

Answer 1

The answer is A

Explanation:

Midpoint formula: (x1 + x2) / 2, (y1 + y2) / 2

In this case, we already have the midpoint, so one of the x and one of the y values are unknown, whereas the sum is not.

(-1 + x) / 2 = 5, (3 + y) / 2 = -2

For both equations multiply both sides by 2

-1 + x = 10, 3 + y = -4

x = 11, y = -7

Rewrite as coordinates.

(11, -7)