document.write( "Question 263724: The Good Seed Flower Shop sells its own brand of fertilizer. It mixes one brand of fertilizer that contains 7% nitrogen with another than contains 8% nitrogen. The resulting mixture contains 7.7% nitrogen. How many pounds of the 7% fertilizer must be used to make 400 pounds of the 7.7% mixture? \n" ); document.write( "
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The Good Seed Flower Shop sells its own brand of fertilizer. It mixes one brand of fertilizer that contains 7% nitrogen with another than contains 8% nitrogen. The resulting mixture contains 7.7% nitrogen. How many pounds of the 7% fertilizer must be used to make 400 pounds of the 7.7% mixture\r
\n" ); document.write( "\n" ); document.write( "7%-------------------- 8%----------------mix 7.7%
\n" ); document.write( "x----------------------400-x-------------- 400 ----------- lbs\r
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\n" ); document.write( "\n" ); document.write( "0.7x+0.8(400-x)=400*0.77
\n" ); document.write( "0.7x+320-0.8x=308\r
\n" ); document.write( "\n" ); document.write( "-0.1x=-12
\n" ); document.write( "x=120 \r
\n" ); document.write( "\n" ); document.write( "120--------------------380-----------------400 Answer\r
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