Respuesta :

Answer:

  G = (2, 9)

Step-by-step explanation:

The midpoint is the average of the endpoints, so we have ...

  M = (G+H)/2

Solving for G gives ...

  G = 2M -H = 2(5, 9) -(8, 9) = (10-8, 18-9)

  G = (2, 9)

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