how would you solve this math problem: Given AC with endpoint a (16,-6) and midpoint M (3, 7). What are the coordinates of end point C?

Answer 1

Since AM=MC, you can find the coordinates of C by adding to M the difference between A and M
i.e.
Xc = Xm+ (Xm-Xa)
Same goes for Yc.
Watch out for the signs.

Answer 2

(-10.5,5)
(-10.5,7)
(-2.5,7)