document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=209752>Question 209752</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780132402866/algebrahomeworkh>sullivan</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> goin into final exam, which will count as two-thirds of the final grade, Mike has test scores of 86, 80, 84, and 90. What score does Mike need on the final in order to earn a B, which requires an average score of 80? What does he need to earn an A? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #158617 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=158617\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> going into final exam, which will count as two-thirds of the final grade,<BR>\n" );
document.write( " Mike has test scores of 86, 80, 84, and 90.<BR>\n" );
document.write( " What score does Mike need on the final in order to earn a B, which requires an average score of 80? <BR>\n" );
document.write( "What does he need to earn an A?<BR>\n" );
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document.write( "Find the average of his test scores:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2886%2B80%2B84%2B90%29%2F4 ALIGN=MIDDLE  ALT=\"%2886%2B80%2B84%2B90%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 85<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let x = final exam score which counts <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3 ALIGN=MIDDLE  ALT=\"2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > (Test count <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282x+%2B+85%29%2F3 ALIGN=MIDDLE  ALT=\"%282x+%2B+85%29%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 80<BR>\n" );
document.write( "2x + 85 = 3(80)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "2x + 85 = 240<BR>\n" );
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document.write( "2x = 240 - 85<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=155%2F2 ALIGN=MIDDLE  ALT=\"155%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 77.5 to have a B<BR>\n" );
document.write( ";<BR>\n" );
document.write( "\"What does he need to earn an A?\"<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282x+%2B+85%29%2F3 ALIGN=MIDDLE  ALT=\"%282x+%2B+85%29%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 90<BR>\n" );
document.write( "2x + 85 = 3(90)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "2x + 85 = 270<BR>\n" );
document.write( ":<BR>\n" );
document.write( "2x = 270 - 85<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=185%2F2 ALIGN=MIDDLE  ALT=\"185%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 92.5 to have an A </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );