document.write( "Question 1020011: a rectangular field has to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq.feet, how many feet of fencing will be required \n" ); document.write( "

Algebra.Com's Answer #635959 by josmiceli(19441) $\"\"$ $\"About$

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20 ft of the rectangle needs no fence, but
\n" ); document.write( "the opposite side needs 20 ft.
\n" ); document.write( "Let $\"+x+\"$ = the length in ft of the adjacent
\n" ); document.write( "sides.
\n" ); document.write( "----------------
\n" ); document.write( "Let $\"+L+\"$ = length of fence needed
\n" ); document.write( " $\"+L+=+20+%2B+2x+\"$ ft
\n" ); document.write( "-------------------
\n" ); document.write( " $\"+680+\"$ ft2 = area of field
\n" ); document.write( " $\"+20x+=+680+\"$
\n" ); document.write( " $\"+x+=+34+\"$ ft
\n" ); document.write( "--------------
\n" ); document.write( " $\"+L+-+20+%2B+2x+\"$ ft
\n" ); document.write( " $\"+L+-+20+%2B+2%2A34+\"$ ft
\n" ); document.write( " $\"+L+=+20+%2B+68+\"$
\n" ); document.write( " $\"+L+=+88+\"$
\n" ); document.write( "88 ft of fencing is needed \n" ); document.write( "

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