document.write( "Question 74147: Jackie has coffee that sells for $9 per pound and coffee that sells for $4 per pound. How many pounds of each must be mixed to get 20 pounds that sells for $8.25 per pound? \n" ); document.write( "
Algebra.Com's Answer #53168 by funmath(2933)\"\" \"About 
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Jackie has coffee that sells for $9 per pound and coffee that sells for $4 per pound. How many pounds of each must be mixed to get 20 pounds that sells for $8.25 per pound?
\n" ); document.write( "Let the amount of the $9 coffee be:x
\n" ); document.write( "Let the amount of the $4 coffee be:y
\n" ); document.write( "Then x+y=20
\n" ); document.write( "If we solve this for y, the y=20-x is the amount of the $4 coffee.
\n" ); document.write( "Cost=amount*(cost/amount)
\n" ); document.write( "so the cost of the $9 coffee is: 9x
\n" ); document.write( "Then the cost of the $4 coffee is: 4y or 4(20-x)
\n" ); document.write( "The total cost is: 8.25(20)
\n" ); document.write( "Problem to solve:
\n" ); document.write( "9x+4(20-x)=8.25(20)
\n" ); document.write( "9x+80-4x=165
\n" ); document.write( "5x+80=165
\n" ); document.write( "5x+80-80=165-80
\n" ); document.write( "5x=85
\n" ); document.write( "5x/5=85/5
\n" ); document.write( "x=17
\n" ); document.write( "The amount of $9 coffee is: x=17 lbs
\n" ); document.write( "The amount of $4 coffee is: y=20-x=20-17=3 lbs.
\n" ); document.write( "Happy Calculating!!!! \n" ); document.write( "
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