document.write( "Question 1164359: A coffee merchant combines coffee that costs $7 per pound with coffee that costs $3.30 per pound. How many pounds of each should be used to make 25 lb of a blend costing $5.89 per pound?
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Algebra.Com's Answer #788734 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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A coffee merchant combines coffee that costs $7 per pound with coffee that costs $3.30 per pound.
\n" ); document.write( " How many pounds of each should be used to make 25 lb of a blend costing $5.89 per pound?
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\n" ); document.write( "let a = amt of $7 coffee required
\n" ); document.write( "the final amt is to be 25 lb, therefore
\n" ); document.write( "(25-a) = amt of $3.30 coffee required
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\n" ); document.write( "A typical mixture equation
\n" ); document.write( "7a + 3.30(25-a) = 5.89(25)
\n" ); document.write( "7a + 82.5 - 3.3a = 147.25
\n" ); document.write( "7a - 3.3a = 147.25 - 82.50
\n" ); document.write( "3.7a = 64.75
\n" ); document.write( "a = 64.75/
\n" ); document.write( "a = 17.5 lb of $7 coffee
\n" ); document.write( "and
\n" ); document.write( "25 - 17.5 = 7.5 lb of $3.30 coffee
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\n" ); document.write( "Check this out
\n" ); document.write( "7(17.5) + 3.3(7.5) = 5.89(25)
\n" ); document.write( "122.50 + 24.75 = 147.25 \n" ); document.write( "

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