document.write( "Question 1135536: Carmen wants to tile the floor of his house. He will need 1,000 square feet of tile. He will do most of the floor with a tile that costs $1.50 per square foot, but also wants to use an accent tile that costs $4.00 per square foot. How many square feet of each tile should he plan to use if he wants the overall cost to be $2 per square foot? \n" ); document.write( "

Algebra.Com's Answer #753158 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "Let x be the number of $1.50 tiles.\r\n" );
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document.write( "Then the number of the $4.00 tiles should be (1000-x).\r\n" );
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document.write( "The total cost will be  1.50*x + 4.00*(1000-x)  dollars.\r\n" );
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document.write( "She wants the average cost would be $2 per square foot:\r\n" );
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document.write( "     = 2.\r\n" );
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document.write( "Solve this equation.\r\n" );
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document.write( "    1.50*x + 4.00*(1000-x) = 2*1000\r\n" );
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document.write( "    1.5x + 4000 - 4x = 2000\r\n" );
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document.write( "    -2.5x = 2000 - 4000\r\n" );
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document.write( "    -2.5x = -2000  ===============>  x =  = 800.\r\n" );
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document.write( "ANSWER.  800 tiles per $1.500 and the rest 1000-800 = 200 tiles per $4.00.\r\n" );
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document.write( "CHECK.    = 2.00 dollars.   ! Correct !\r\n" );
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