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17-08-2020
Mathematics

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Given that point A is the midpoint of line segment ED, where E( -1,9) and A(4,5), what is the location of point D?

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sqdancefan sqdancefan

17-08-2020

Answer:

D(9, 1)

Step-by-step explanation:

A being the midpoint means its coordinates satisfy ...

A = (E + D)/2

Solving for D, we find ...

D = 2A -E

= 2(4, 5) -(-1, 9) = (2·4 +1, 2·5 -9)

D = (9, 1)

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