document.write( "Question 623274: the midpoint of the line segment from P1 to P2 is(-1,7). If P1=(-7,8) what is P2 \n" ); document.write( "
Algebra.Com's Answer #392021 by lwsshak3(11628)\"\" \"About 
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the midpoint of the line segment from P1 to P2 is(-1,7). If P1=(-7,8) what is P2
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\n" ); document.write( "midpoint formula: (x1+x2)/2,(y1+y2)/2
\n" ); document.write( "For given problem:
\n" ); document.write( "P1=(-7,8)
\n" ); document.write( "P2=(x,y)
\n" ); document.write( "Midpoint=(-1,7)
\n" ); document.write( "..
\n" ); document.write( "(x-7)/2, (y+8)/2=(-1,7)
\n" ); document.write( "(x-7)/2=-1
\n" ); document.write( "x-7=-2
\n" ); document.write( "x=5
\n" ); document.write( "..
\n" ); document.write( "(y+8)/2=7
\n" ); document.write( "y+8=14
\n" ); document.write( "y=6
\n" ); document.write( "..
\n" ); document.write( "P2=(5,6)
\n" ); document.write( "check: (5-7)/2,(6+8)/2=(-1,7)\r
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