document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=128751>Question 128751</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary has a $90 gift certificate for a book store where paperbacks cost $9 and hardback books cost $12.  She must spend at least $25 and no more than $90 to use the gift certificate.  Write a system of inequalities to determine the formula for using the gift certificate.  \r<BR>\n" );
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document.write( "I came up with 9x + 12y is less than or equal to 90; and 9x + 12y is greater than or equal to 25.  Is that correct?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #94204 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=94204\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 25<=9X+12Y<=90 THIS IS A SINGLE EQUATION FOR THIS PROBLEM. </SPAN>\n" );
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