Points $(1,-5)$ and $(11,7)$ are the opposite vertices of a parallelogram.  What are the coordinates of the point where the diagonals of the parallelogram intersect?
Question:
Points $(1,-5)$ and $(11,7)$ are the opposite vertices of a parallelogram.  What are the coordinates of the point where the diagonals of the parallelogram intersect?
Answer:
Let's think step by step.

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(6,1)
Points $(1,-5)$ and $(11,7)$ are the opposite vertices of a parallelogram.  What are the coordinates of the point where the diagonals of the parallelogram intersect?
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