document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025671>Question 1025671</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A petroleum company has two different sources of crude oil. The first source provides crude oil that is 50% hydrocarbons, and the second one provides crude oil that is 75% hydrocarbons. In order to obtain 60 gallons of crude oil that is 70% hydrocarbons, how many gallons of crude oil must be used from each of the two sources?\r<BR>\n" );
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document.write( "first source how many gallons?<BR>\n" );
document.write( "second source how many gallons?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #640965 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=640965\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A petroleum company has two different sources of crude oil. The first source provides crude oil that is 50% hydrocarbons, and the second one provides crude oil that is 75% hydrocarbons. In order to obtain 60 gallons of crude oil that is 70% hydrocarbons, how many gallons of crude oil must be used from each of the two sources? <BR>\n" );
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document.write( "Quantity:: f + s = 60 gallons<BR>\n" );
document.write( "Hydro Eq:: 0.50f + 0.75s = 0.70*60<BR>\n" );
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document.write( "50f + 50s = 50*60<BR>\n" );
document.write( "50f + 75s = 70*60<BR>\n" );
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document.write( "Subtract and solve for \"s\"::<BR>\n" );
document.write( "25s = 20*60<BR>\n" );
document.write( "s = (4/5)60<BR>\n" );
document.write( "s = 48 gallons (amt. of 75% needed)<BR>\n" );
document.write( "f = 12 gallons (amt. of 50% needed)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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