document.write( "Question 511868: The points A(1,7), B(20,7) and C(p,q) form the verticies of a triangle ABC. The point D(8,2) is the mid-point of AC.
\n" ); document.write( "a) Find the value of p and the value of q.
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Algebra.Com's Answer #342430 by stanbon(75887)\"\" \"About 
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The points A(1,7), B(20,7) and C(p,q) form the verticies of a triangle ABC. The point D(8,2) is the mid-point of AC.
\n" ); document.write( "a) Find the value of p and the value of q.
\n" ); document.write( "A(1,7),C(p,q)
\n" ); document.write( "midpoint (8,2)
\n" ); document.write( "---
\n" ); document.write( "Fact: The midpoint coordinates are the average of the
\n" ); document.write( "corresponding endpoint coordinates.
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\n" ); document.write( "Solve:
\n" ); document.write( "(1+p)/2 = 8
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\n" ); document.write( "(7+q)/2 = 2
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\n" ); document.write( "1+p = 16
\n" ); document.write( "p = 15
\n" ); document.write( "----
\n" ); document.write( "7+q = 4
\n" ); document.write( "q = -3
\n" ); document.write( "----
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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