document.write( "Question 1007975: A small plane took 3 hours to fly 960 km from Ottawa to Halifax with a tail wind. On the return trip, flying into the wind, the plane took 4 hours. Find the wind speed and the speed of the plane in still air. \r
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\n" ); document.write( "\n" ); document.write( "A solution of 10% sulfuric acid and one of 25% sulfuric acid are to be used to make 500 ml of 20% sulfuric acid. How many ml of each solution needs to be used in the mixture? (round answers to the nearest ml) \n" ); document.write( "

Algebra.Com's Answer #623767 by josgarithmetic(39617) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "WhichWay    rate       time      distance\r\n" );
document.write( "O to H      r+w         3        960\r\n" );
document.write( "H to O      r-w         4        960\r\n" );
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document.write( "Solve the system.\r\n" );
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\n" ); document.write( "\n" ); document.write( "x, volume of the 10% solution
\n" ); document.write( "500-x, volume of the 25% solution
\n" ); document.write( " $\"%2810x%2B25%28500-x%29%29%2F500=20\"$ \n" ); document.write( "

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