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22-06-2017
Mathematics

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If the midpoint between (x, 7) and (10, 11) is (15, 9), find the value of x.

Respuesta :

22-06-2017

The midpoint between two endpoints is just the average of the coordinates of the endpoints.

p=((x1+x2)/2+(y1+y2)/2), in this case:

So the x value of the midpoint is:

mp=(x1+x2)/2 and we are told mp=15 and x2=10 so

15=(x+10)/2

30=x+10

20=x so

x=20

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