Answer: (-11, -5.5)
Explanation:
Use Midpoint formula:
Midpoint M= (-9, -3)
(x1, y1)=(-7, -0.5)
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=-9
-7+x2=-18
x2=-11
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=-3
-0.5+y2=-6
y2=-5.5
(-11, -5.5)
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