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the midpoint of AB is M(9,7) One endpoint is A(3,9) Find coordinates of endpoint B

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the midpoint of AB is M(9,7) One endpoint is A(3,9) Find coordinates of endpoint B.

mid-point
mid-point-of-a-line

asked Mar 5, 2014 in GEOMETRY by mathgirl Apprentice

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1 Answer

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= A(3,9)

= B(x,y)

Coordinates of AB midpoint is

Multiple to each side by 2.

3+x = 18

Subtract 3 from each side.

x = 15

Multiple to each side by 2.

9+y = 14

Subtract 9 from each side.

y = 5

B coordinate is (15,5).

answered Mar 5, 2014 by ashokavf Scholar

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