document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=664315>Question 664315</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Zachary has scores of 91,89,84 on his first three algebra test<BR>\n" );
document.write( "What score does he need on his fourth test in order<BR>\n" );
document.write( "to have a mean score of exactly 90 on his four algebra </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #413232 by </B><A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><B>ReadingBoosters(3246)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><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=413232\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Average is the (sum of the numbers)/(the # of numbers)<BR>\n" );
document.write( "Given 3 numbers and the average, plug them into the equation, where x is the unknown 4th score<BR>\n" );
document.write( "...<BR>\n" );
document.write( "(91 + 89 + 84 + x)/4 = 90<BR>\n" );
document.write( "Solve for x<BR>\n" );
document.write( "Combine like terms<BR>\n" );
document.write( "(264 + x)/4 = 90<BR>\n" );
document.write( "Multiply by 4<BR>\n" );
document.write( "264 + x = 360<BR>\n" );
document.write( "Isolate x<BR>\n" );
document.write( "x = 360 - 264<BR>\n" );
document.write( "x = 96<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Zachary must score a 96<BR>\n" );
document.write( ".........................<BR>\n" );
document.write( "Delighted to help.<BR>\n" );
document.write( "-Reading Boosters<BR>\n" );
document.write( "Wanting for others what we want for ourselves.<BR>\n" );
document.write( "www.MyHomeworkAnswers.com </SPAN>\n" );
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