document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=251677>Question 251677</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If Madeline scores 97% on her next math test, her average will be 90%. If she scores 73%, her average will be 87%. How many tests has Madeline already taken?<BR>\n" );
document.write( "a) 6 b) 7 c) 8 d) 9 e) none of these </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #183351 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=183351\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "let n= tests already taken<BR>\n" );
document.write( "a=previous average<BR>\n" );
document.write( "(97+n*a)/(n+1)=90<BR>\n" );
document.write( "(73+n*a)/(n+1)=87<BR>\n" );
document.write( "b)7<BR>\n" );
document.write( "previous average was 89<BR>\n" );
document.write( "check<BR>\n" );
document.write( "(97+(7*89))/8=90<BR>\n" );
document.write( "(97+623)/8<BR>\n" );
document.write( "720/8=90<BR>\n" );
document.write( "90=90<BR>\n" );
document.write( "(73+(7*89))/8=87<BR>\n" );
document.write( "(73+623)/8=87<BR>\n" );
document.write( "696/8=87<BR>\n" );
document.write( "87=87 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );