document.write( "Question 313119: One endpoint P (1, -3) and the midpoint M (-7, 7) of line segment PQ are given. Find the coordinates of the other endpoint, Q.
\n" ); document.write( " A) Q (9, -23)
\n" ); document.write( " B) Q (-13, 15
\n" ); document.write( " C) Q (-15, 17)\r
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\n" ); document.write( "\n" ); document.write( "Please Help...\r
\n" ); document.write( "\n" ); document.write( "Thanks,
\n" ); document.write( " Stephanie Jackins
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Algebra.Com's Answer #223930 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
The distance from the midpoint to P is the same as the distance from the midpoint to Q.
\n" ); document.write( "x:P to M, \"DELTA%2Ax=Mx-Px=-7-1=-8\"
\n" ); document.write( "y:P to M, \"DELTA%2Ay=My-Py=7-%28-3%29=10\"
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\n" ); document.write( "x:M to Q, \"Qx=Mx%2BDELTA%2Ax=-7%2B%28-8%29=-15\"
\n" ); document.write( "y:M to Q, \"Qy=My%2BDELTA%2Ay=7%2B10=17\"
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\n" ); document.write( "Q=(\"-15\",\"17\")
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\n" ); document.write( "C) is the correct answer
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