1. Point P is the midpoint of segment AB. Co-ordinates of P are (5, -1) and A are (2, -4). What are the co-ordinates of point B?





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  • By: anil on 05 May 2019 01.45 am
    Mid-point = $$(frac{x_{1}+x_{2}}{2} , frac{y_{1}+y_{2}}{2})$$ (5 , -1) = $$(frac{2+x}{2} , frac{-4+y}{2})$$ 2+x = 10 so x = 8 -4+y = -2 so y = 2 so the answer is option B.
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