document.write( "Question 386942: A 100-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 20 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and vertical distances spanned by this brace\r
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Algebra.Com's Answer #273474 by mananth(16946)\"\" \"About 
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A 100-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 20 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and vertical distances spanned by this brace\r
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\n" ); document.write( "The diagonal (d) horizontal span (h)and the vertical support(v) form a right triangle
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\n" ); document.write( "h=(v+20)
\n" ); document.write( "d^2=v^2+h^2
\n" ); document.write( "(100)^2=v^2+(v+20)^2
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\n" ); document.write( "100^2=v^2+v^2+40v+400
\n" ); document.write( "2v^2+40v+400-10000=0
\n" ); document.write( "2v^2+40v-9600=0
\n" ); document.write( "/2
\n" ); document.write( "v^2+20v-4800=0
\n" ); document.write( "v^2+80v-60x-4800=0
\n" ); document.write( "v(v+80)-60(v+80)=0
\n" ); document.write( "(v+80)(v-60)=0
\n" ); document.write( "v = 60 feet the vertical height
\n" ); document.write( "horizontal span = 80 feet
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\n" ); document.write( "m.ananth@hotmail.ca
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