document.write( "Question 572250: The Robertsons put a rectangular pool with a stone walkway around it in their backyard. The total length of the pool and walkway is 3 times the total width. The walkway is 2 feet wide all around.
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document.write( "a-write an expression for the area of the pool.
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document.write( "b-find the area of the pool when the total width is 10 feet.
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document.write( "c-find the area of the pool when the total width is 9 feet.\r
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document.write( "please answer a, b, and c! \n" );
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Algebra.Com's Answer #368348 by nyc_function(2741)![]() ![]() You can put this solution on YOUR website! Let w = width\r \n" ); document.write( "\n" ); document.write( "Let A = area\r \n" ); document.write( "\n" ); document.write( "A = (w - 2)(3w - 2)...This answers part a.\r \n" ); document.write( "\n" ); document.write( "By the way, the answer for part a can also be given as 3x^2 - 8x + 4 after multiplying the factors (w - 2)(3w - 2).\r \n" ); document.write( "\n" ); document.write( "Part b:\r \n" ); document.write( "\n" ); document.write( "A = (10 - 2)(3(10) - 2)\r \n" ); document.write( "\n" ); document.write( "A = (8)(28)\r \n" ); document.write( "\n" ); document.write( "A = 224ft^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Part c:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A = (9 - 2)(3(9) - 2)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A = (7)(25)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A = 175ft^2 \n" ); document.write( " |