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03-11-2020
Mathematics

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the mid point of ab m(1,-1). if the coordinates of a are (7,-4) what are the coordinates of b

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sqdancefan sqdancefan

03-11-2020

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Answer:

b = (-5, 2)

Step-by-step explanation:

b = 2m - a = 2(1, -1) -(7, -4) = (2-7, -2+4)

b = (-5, 2)

__

About the formula

The midpoint is given by the formula ...

m = (a+b)/2

Solving for b gives ...

b = 2m -a . . . as above

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