document.write( "Question 151878: Could someone please help me with this word problem? I can't get past the point of the inverse matrix.\r
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document.write( "A local sorority sold hotdogs and bratwursts at the spring fling picnic. The first day they sold 8 dozen hotdogs and 13 dozen bratwursts for 339.60. The second day they sold 10 dozen hotdogs and 15 dozen bratwursts for a total of 402.00. How much did each cost?\r
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document.write( "Each hotdog sold for $?
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document.write( "Each bratwurst sold for $?
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Algebra.Com's Answer #111703 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 8*12H+13*12B=339.60 \n" ); document.write( "96H+156B=339.60 (MULTIPLY BY 5) \n" ); document.write( "10*12H+15*12B=402.00 \n" ); document.write( "120H+180B=402.00 (MULTIPLY BY-4 & ADD) \n" ); document.write( "480H+780B=1698 \n" ); document.write( "-480H-720B=-1608 \n" ); document.write( "---------------------------- \n" ); document.write( "0H+60B=90 \n" ); document.write( "B=90/60 \n" ); document.write( "B=$1.50 FOR EACH BRATWURST. \n" ); document.write( "10*12H+15*12*1.5=402 \n" ); document.write( "120H+270=402 \n" ); document.write( "120H=402-270 \n" ); document.write( "120H=132 \n" ); document.write( "H=132/120 \n" ); document.write( "H=$1.10 FOR EACH HOTDOG. \n" ); document.write( "PROOF: \n" ); document.write( "10*12*1.10+15*12*1.5=402 \n" ); document.write( "120*1.10+180*1.5=402 \n" ); document.write( "132+270=402 \n" ); document.write( "402=402 \n" ); document.write( " \n" ); document.write( " |