document.write( "Question 776681: the endpoints of RS are R(-2,-1) and S(2,3). find the coordinates of the midpoint of RS. then find the distance between R and S \n" ); document.write( "

Algebra.Com's Answer #473689 by josmiceli(19441) $\"\"$ $\"About$

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First find the SUM of the x-coordinates
\n" ); document.write( " $\"+x%5B1%5D+%2B+x%5B2%5D+=+-2+%2B+2+\"$
\n" ); document.write( " $\"+x%5B1%5D+%2B+x%5B2%5D+=+0+\"$
\n" ); document.write( "The x-coordinate of the midpoint is:
\n" ); document.write( " $\"+%28+x%5B1%5D+%2B+x%5B2%5D+%29+%2F+2+=+0%2F2+\"$
\n" ); document.write( " $\"+0%2F2+=+0+\"$
\n" ); document.write( "-----------
\n" ); document.write( " $\"+y%5B1%5D+%2B+y%5B2%5D+=+-1+%2B+3+\"$
\n" ); document.write( " $\"+y%5B1%5D+%2B+y%5B2%5D+=+2+\"$
\n" ); document.write( " $\"+%28+y%5B1%5D+%2B+y%5B2%5D+%29+%2F+2+=+2%2F2+\"$
\n" ); document.write( " $\"+2%2F2+=+1+\"$
\n" ); document.write( "The midpoint is at ( 0,1 )
\n" ); document.write( "---------------------
\n" ); document.write( "Use the distance formula
\n" ); document.write( " $\"+d+=+sqrt%28+%28+2-%28-2%29+%29%5E2+%2B+%28+3+-%28-1%29+%29%5E2+%29+%29+\"$
\n" ); document.write( " $\"+d+=+sqrt%28++4%5E2+%2B+4%5E2+%29+\"$
\n" ); document.write( " $\"+d+=+sqrt%28+32+%29+\"$
\n" ); document.write( " $\"+d+=+4%2Asqrt%28+2+%29+\"$
\n" ); document.write( " \n" ); document.write( "

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