document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1080685>Question 1080685</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.) The average of 7 numbers is 5. If the average of first six of these numbers is 4, the seventh number is?\r<BR>\n" );
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document.write( "2.) Three years ago the average age of a family of 5 member was 27 years. On the addition of a child to the family, the present average age of the family is still 27 years. Find the present age of the child.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #694880 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=694880\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  1.) The average of 7 numbers is 5.<BR>\n" );
document.write( " If the average of first six of these numbers is 4, the seventh number is?<BR>\n" );
document.write( "let n = the 7th number<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%286%284%29%2Bn%29%29%2F7 ALIGN=MIDDLE  ALT=\"%28%286%284%29%2Bn%29%29%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 5<BR>\n" );
document.write( "24 + n = 7 * 5<BR>\n" );
document.write( "n = 35 - 24<BR>\n" );
document.write( "n = 11 is the 7th number<BR>\n" );
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document.write( " 2.) Three years ago the average age of a family of 5 member was 27 years.<BR>\n" );
document.write( "let A =  average of the 5 people now<BR>\n" );
document.write( "then 3 yrs ago<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%285A+-+5%283%29%29%29%2F5 ALIGN=MIDDLE  ALT=\"%28%285A+-+5%283%29%29%29%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 27<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%285A+-+15%29%29%2F5 ALIGN=MIDDLE  ALT=\"%28%285A+-+15%29%29%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 27<BR>\n" );
document.write( "Cancel the 5 and you have:<BR>\n" );
document.write( " A - 3 = 27<BR>\n" );
document.write( " A = 30 yrs is their present average age<BR>\n" );
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document.write( "\"On the addition of a child to the family, the present average age of the family is still 27 years.\"<BR>\n" );
document.write( "let c = the age of the additional child<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%285%2830%29+%2B+c%29%29%2F6 ALIGN=MIDDLE  ALT=\"%28%285%2830%29+%2B+c%29%29%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 27<BR>\n" );
document.write( "multiply both sides by 6<BR>\n" );
document.write( "150 + c = 162<BR>\n" );
document.write( "c = 162 -150<BR>\n" );
document.write( "c = 12 yrs is the present age of the child. </SPAN>\n" );
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