The coordinates of midpoint M and endpoint C of a segment are M(25.4, 60.1) and C(18.3, 72.5). Find the coordinates of the other endpoint.

The midpoint is the average of the two endpoints, so the other endpoint is twice the midpoint minus endpoint C. Calculate each coordinate: x = 2(25.4) − 18.3 = 32.5, and y = 2(60.1) − 72.5 = 47.7. The other endpoint is (32.5, 47.7), choice C.

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