Answer:
1. (1, -3.5)
2. (-9, 25) *note, there is a typo in the question, please ask your teacher about this
Explanation:
Use the midpoint formula to calculate the midpoint.
Use the formula to find the end point, and double the distance between your endpoint and midpoint to find the other endpoint.
Since the distance between the x coordinate is 8 (from -1 to 7), then the other endpoint is 8 away from -1, or -9.
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