document.write( "Question 384081: M (9, 8) is the midpoint of RS. The coordinates of S are (10, 10). What are the coordinates of R? \n" ); document.write( "

Algebra.Com's Answer #271872 by Fombitz(32388) $\"\"$ $\"About$

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M (9, 8) is the midpoint of RS. The coordinates of S are (10, 10). What are the coordinates of R?\r
\n" ); document.write( "\n" ); document.write( "Use the midpoint formula,
\n" ); document.write( " $\"x%5BM%5D=%28x%5BR%5D%2Bx%5BS%5D%29%2F2\"$
\n" ); document.write( " $\"2%2Ax%5BM%5D=x%5BR%5D%2Bx%5BS%5D\"$
\n" ); document.write( " $\"x%5BR%5D=2%2Ax%5BM%5D-x%5BS%5D\"$
\n" ); document.write( " $\"x%5BR%5D=2%2A9-10\"$
\n" ); document.write( "Similarly,
\n" ); document.write( " $\"y%5BM%5D=%28y%5BR%5D%2By%5BS%5D%29%2F2\"$
\n" ); document.write( " $\"2%2Ay%5BM%5D=y%5BR%5D%2By%5BS%5D\"$
\n" ); document.write( " $\"y%5BR%5D=2%2Ay%5BM%5D-y%5BS%5D\"$
\n" ); document.write( " $\"y%5BR%5D=2%2A8-10\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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