document.write( "Question 1012424: If I buy 3 pounds of jelly beans and 8 pounds of trail mix it costs $23.00 but if i buy 5 pounds of jelly beans and 2 pounds of trail mix it costs $10.00 how much do jelly beans and trail mix cost on their own per pound? \n" ); document.write( "
Algebra.Com's Answer #628344 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! Call the cost of a pound of jelly beans, j. \n" ); document.write( "Call the cost of a pound of trail mix, t. \n" ); document.write( "Then we can write two equations...we will work in cents... \n" ); document.write( "3j + 8t = 2300 \n" ); document.write( "5j + 2t = 1000 \n" ); document.write( "Let us multiply the bottom one by four and subtract it from the top one... \n" ); document.write( "3j + 8t = 2300 \n" ); document.write( "-(20j + 8t = 4000) \n" ); document.write( "-------------------- \n" ); document.write( "-17j = -1700 \n" ); document.write( "j = 100 ($1.00 a pound for jelly beans) \n" ); document.write( "Now plug that in to the first equation and get \n" ); document.write( "3(100) + 8t = 2300 \n" ); document.write( "300 + 8t = 2300 \n" ); document.write( "8t = 2000 \n" ); document.write( "t = 250 ($2.50 a pound for trail mix) \n" ); document.write( " |