document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=191592>Question 191592</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Making Change. Christina makes a $9.25 purchase<BR>\n" );
document.write( "at a bookstore in Reno with a $20 bill. The store has no<BR>\n" );
document.write( "bills and gives her the change in quarters and fifty-cent<BR>\n" );
document.write( "pieces. There are 30 coins in all. How many of each kind<BR>\n" );
document.write( "are there?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #143739 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=143739\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Making Change. Christina makes a $9.25 purchase<BR>\n" );
document.write( "at a bookstore in Reno with a $20 bill. The store has no<BR>\n" );
document.write( "bills and gives her the change in quarters and fifty-cent<BR>\n" );
document.write( "pieces. There are 30 coins in all. How many of each kind<BR>\n" );
document.write( "are there?<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "q = # of quarters<BR>\n" );
document.write( "h = # of half dollars<BR>\n" );
document.write( "Her change is $11.75<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "q + h = 30   (30 coins)<BR>\n" );
document.write( "25q + 50h = 1175 (the total money)<BR>\n" );
document.write( "q = 30-h  (from the 1st eqn)<BR>\n" );
document.write( "Sub that into the 2nd eqn<BR>\n" );
document.write( "25(30-h) + 50h = 1175<BR>\n" );
document.write( "750 - 25h + 50h = 1175<BR>\n" );
document.write( "25h = 425<BR>\n" );
document.write( "h = 17<BR>\n" );
document.write( "q = 13<BR>\n" );
document.write( "You can do the check<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );