document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=112744>Question 112744</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I do not have the ISBN # because my chapter is printed off since I am going to school on-line. I would appreciate some help on this problem please.<BR>\n" );
document.write( "Sam must have an average of 70 or more on his summer course to obtain a grade of C. His first three test grades were 75, 63, and 68. Write an inequality representing the score that Sam must get on the last test to get a C grade.<BR>\n" );
document.write( "I believe that the answer is a 69 for the final score. What I did was added the 3 scores and divided by 3, I hope this was right but I am unsure how to write it into an inequality.\r<BR>\n" );
document.write( "\n" );
document.write( "Thank You,<BR>\n" );
document.write( "Barb Neely </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #82185 by </B><A HREF=/tutors/aboutme.mpl?userid=mathnard><B>mathnard(10)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathnard><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=82185\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's check your answer... let's average the 4 test scores now, including the 69 that you are guessing for the last test score :<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2875%2B63%2B68%2B69%29%2F4=68.75 ALIGN=MIDDLE  ALT=\"%2875%2B63%2B68%2B69%29%2F4=68.75\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "68.75 is not a C, so it looks like we will have to re-think this problem.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "You actually need to average 4 numbers if you want to set up the inequality correctly.  You have the first the grades AND the unknown last grade (x)...and then divide by 4 and THIS should be greater than 70...\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2875%2B63%2B68%2Bx%29%2F4%3E70 ALIGN=MIDDLE  ALT=\"%2875%2B63%2B68%2Bx%29%2F4%3E70\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Now, let's multiply both sides by 4:<BR>\n" );
document.write( "The fours will cancel out on the left side, but not on the right side...<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=75%2B63%2B68%2Bx%3E280 ALIGN=MIDDLE  ALT=\"75%2B63%2B68%2Bx%3E280\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Let's add the numbers together on the left-hand side:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=206%2Bx%3E280 ALIGN=MIDDLE  ALT=\"206%2Bx%3E280\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "And finally, let's subtract 206 from both sides:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%3E74 ALIGN=MIDDLE  ALT=\"x%3E74\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Really, it should be that x is greater than or EQUAL to 74 if the student wants to reach a grade of 70 or better. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );