document.write( "Question 186874: I have a few problems and I just do not understand how to do them. It is not from a text book. Can you please help me?
\n" ); document.write( "A rectangular garden has a dimension of 15 feet by 11 feet. A gravel path of uniform width is to be built around the garden. How wide can the path be if there is enough gravel for 192 square feet?
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Algebra.Com's Answer #140086 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
given:
\n" ); document.write( "\"15%2A11+=+165\" ft2 = The area of the garden
\n" ); document.write( "If the gravel path is of uniform width, it will
\n" ); document.write( "extend the width of the garden by \"2x\"
\n" ); document.write( "and it will extend the length of the garden
\n" ); document.write( "by \"2x\" also.
\n" ); document.write( "So, the area of garden + path =
\n" ); document.write( "\"%2815+%2B+2x%29%2A%2811+%2B+2x%29\"
\n" ); document.write( "Also I know area of garden + path =
\n" ); document.write( "\"165+%2B+192+=+357\", so
\n" ); document.write( "\"%2815+%2B+2x%29%2A%2811+%2B+2x%29+=+357\"
\n" ); document.write( "\"165+%2B+22x+%2B+30x+%2B+4x%5E2+=+357\"
\n" ); document.write( "Subtract \"165\" from both sides
\n" ); document.write( "\"22x+%2B+30x+%2B+4x%5E2+=+192\"
\n" ); document.write( "Rewrite the left side
\n" ); document.write( "\"4x%5E2+%2B+52x+=+192\"
\n" ); document.write( "Divide both sides by \"4\"
\n" ); document.write( "\"x%5E2+%2B+13x+=+48\"
\n" ); document.write( "\"x%5E2+%2B+13x+-+48+=+0\"
\n" ); document.write( "Use the quadratic formula
\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"a+=+1\"
\n" ); document.write( "\"b+=+13\"
\n" ); document.write( "\"c+=+-48\"
\n" ); document.write( "\"x+=+%28-13+%2B-+sqrt%28+13%5E2-4%2A1%2A%28-48%29+%29%29%2F%282%2A1%29+\"
\n" ); document.write( "\"x+=+%28-13+%2B-+sqrt%28+169+%2B+192+%29%29%2F2+\"
\n" ); document.write( "\"x+=+%28-13+%2B-+sqrt%28+361+%29%29%2F2+\"
\n" ); document.write( "\"x+=+%28-13+%2B-+19%29%2F2+\"
\n" ); document.write( "\"x+=+3\"
\n" ); document.write( "\"x+=+-16\" (not useful here)
\n" ); document.write( "The path can be 3 feet wide
\n" ); document.write( "check answer:
\n" ); document.write( "\"%2815+%2B+2x%29%2A%2811+%2B+2x%29+=+357\"
\n" ); document.write( "\"%2815+%2B+2%2A3%29%2A%2811+%2B+2%2A3%29+=+357\"
\n" ); document.write( "\"%2815+%2B+6%29%2A%2811+%2B+6%29+=+357\"
\n" ); document.write( "\"21%2A17+=+357\"
\n" ); document.write( "\"357+=+357\"
\n" ); document.write( "OK
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