document.write( "Question 294640: five hot dogs and four burgers cost 14.75$. four hot dogs and 5 burgers cost 14.50$. Find the cost of one hot dog and the cost of one burger
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document.write( "5h+4b=14.75
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document.write( "4h+5b=14.50
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document.write( "First impression is to add them
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document.write( "9h+9b= 29.25
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document.write( "9(h+b)=29.25
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document.write( "h+b=29.25/9
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document.write( "but this makes no sense
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document.write( "Any help is greatly appreciated \n" );
document.write( "
Algebra.Com's Answer #212424 by stanbon(75887) ![]() You can put this solution on YOUR website! five hot dogs and four burgers cost 14.75$. four hot dogs and 5 burgers cost 14.50$. Find the cost of one hot dog and the cost of one burger \n" ); document.write( "5h+4b=14.75 \n" ); document.write( "4h+5b=14.50 \n" ); document.write( "First impression is to add them \n" ); document.write( "---------------------------------------- \n" ); document.write( "The objective is to eliminate one of the variables. \n" ); document.write( "---- \n" ); document.write( "To get rid of the \"h\" terms, multiply 1st equation by 4 \n" ); document.write( "and 2nd equation by 5 to get: \n" ); document.write( "---- \n" ); document.write( "20h + 16b = 4*15.75 \n" ); document.write( "20h + 25b = 5*14.50 \n" ); document.write( "-------------------------- \n" ); document.write( "Now, SUBTRACT the 1st Eq. from the 2nd and solve for \"b\": \n" ); document.write( "9b = 5*14.5 - 4*15.75 \n" ); document.write( "9b = 9.5 \n" ); document.write( "b = $1.06 \n" ); document.write( "---------------- \n" ); document.write( "To solve for \"h\", substitute b=1.06 into either of the original equations. \n" ); document.write( "5h+4b=14.75 \n" ); document.write( "5h + 4(1.06) = 14.75 \n" ); document.write( "5h = 14.75-4.24 \n" ); document.write( "5h = 12.51 \n" ); document.write( "h = $2.50 \n" ); document.write( "=============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |