document.write( "Question 474334: A dehydrated patient needs 6.1% saline IV. Unfortunately the hospital only has bags of 5% and 7% saline solutions. How many liters of each of these solutions should be mixed together to yield 2 liters of the desired concentration? \n" ); document.write( "
Algebra.Com's Answer #325324 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! A dehydrated patient needs 6.1% saline IV. Unfortunately the hospital only has bags of 5% and 7% saline solutions. How many liters of each of these solutions should be mixed together to yield 2 liters of the desired concentration? \n" ); document.write( "------------------ \n" ); document.write( "Equation: \n" ); document.write( "saline + saline = saline \n" ); document.write( "0.05x + 0.07(2-x) = 0.061*2 \n" ); document.write( "--- \n" ); document.write( "Multiply thru by 1000 to get: \n" ); document.write( "50x + 70*2 -70x = 61*2 \n" ); document.write( "------ \n" ); document.write( "-20x = -9*2 \n" ); document.write( "--- \n" ); document.write( "x = 0.9 liters (amt of 5% solution needed) \n" ); document.write( "---- \n" ); document.write( "2-x = 2-0.9 = 1.1 liters (amt. of 7% solution needed) \n" ); document.write( "======================================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=========== \n" ); document.write( " |