document.write( "Question 1001866: The permitter of a rectangular concrete slab is 72 feet and its area is 308 square feet. What is the length of the longer side of the slab?
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document.write( "23 ft
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document.write( "25 ft
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document.write( "22 ft
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document.write( "24 ft \n" );
document.write( "
Algebra.Com's Answer #618937 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! The permitter of a rectangular concrete slab is 72 feet and its area is 308 square feet. What is the length of the longer side of the slab? \n" ); document.write( "let x=length \n" ); document.write( "let y=width \n" ); document.write( "2x+2y=perimeter=72 \n" ); document.write( "xy=308=area=308 \n" ); document.write( "y=308/x \n" ); document.write( "2x+2(308/x=72 \n" ); document.write( "lcd:x \n" ); document.write( "2x^2+616=72x \n" ); document.write( "2x^2-72x+616 \n" ); document.write( "x^2-36x+308=0 \n" ); document.write( "(x-22)(x-14) \n" ); document.write( "x=14 or 22 \n" ); document.write( "What is the length of the longer side of the slab? 22 ft \n" ); document.write( " |