document.write( "Question 426581: in the standard (x,y) coordinate plane, point m with coordinates (5,4) is the midpoint of AB, and B has coordinates (7,3). What are the coordinates of A? \n" ); document.write( "

Algebra.Com's Answer #296730 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "point m with coordinates (5,4) is the midpoint of AB.  Pt B(7,3)
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document.write( "Midpoint Pt(x,y):  ( , )
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document.write( " (7+ x)/2 = 5 
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document.write( "     x = 3
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document.write( " (3 + y)/2 = 4
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document.write( "     y = 5 
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document.write( " Pt A(3,5)
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document.write( "CHECKING our Answer***  (3+7)/2 = 5   and (5+3)/2=4
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