document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=202514>Question 202514</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Rachel hands in her 4th exam. the scores  on her first three examns were 75,95,97.what foes she need to earn on the 4th exam to average at least a 90 on the four exams. contruct an inequality with the variable x representing the 4th score, the salvge the inquality for x. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #152811 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10557)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=152811\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since Rachel needs to get AT LEAST a 90-average on the four exams, using the average formula, which states: \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sum+of+scores%29%2F%28number+of+scores%29+=+Average ALIGN=MIDDLE  ALT=\"%28sum+of+scores%29%2F%28number+of+scores%29+=+Average\"   DISABLED_style= \"max-width:90%; height:auto;\" >, we then get the following inequality:  \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2875%2B95%2B97%2Bx%29%2F4%3E=90 ALIGN=MIDDLE  ALT=\"%2875%2B95%2B97%2Bx%29%2F4%3E=90\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Multiplying each expression by the LCD, 4, we get:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=267+%2B+x%3E=360 ALIGN=MIDDLE  ALT=\"267+%2B+x%3E=360\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%3E=93 ALIGN=MIDDLE  ALT=\"x%3E=93\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Therefore, in order for Rachel to average at least a 90 on all four exams, she has to score a 93, or more on her 4th and final exam.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Check<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2875+%2B+95+%2B+97+%2B+93%29%2F4+%3E=+90 ALIGN=MIDDLE  ALT=\"%2875+%2B+95+%2B+97+%2B+93%29%2F4+%3E=+90\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=360%2F4%3E=90 ALIGN=MIDDLE  ALT=\"360%2F4%3E=90\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=90%3E=90 ALIGN=MIDDLE  ALT=\"90%3E=90\"   DISABLED_style= \"max-width:90%; height:auto;\" >  <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );