Respuesta :

SoccerHalo

Answer:

( 9, -15/2) or (9,-7.5)

Step-by-step explanation:

Use the midpoint formula

x1 + x2  / 2

y1 + y2  / 2


0 + 18  / 2  =  9

-5 + (-10)  / 2  

-5 - 10  / 2  = -15 /2