SOLUTION: Find the coordinates of B. M is the midpoint of line AB. A(7,5), M(9,7)

Question 222237: Find the coordinates of B. M is the midpoint of line AB.
A(7,5), M(9,7)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the coordinates of B. M is the midpoint of line AB.
A(7,5), M(9,7)
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Let B have coordinates (x,y)
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If M is the midpoint (x+7)/2 = 9 ; x+7 = 18 ; x = 11
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If M is the midpoint (y+5)/2 = 7 ; y+5 = 14 ; y = 9
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B has coordinates (11,9)
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Cheers,
Stan H.
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