document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=304898>Question 304898</A>: <I><SPAN STYLE=\"word-break: break-all;\">  A runner’s heart rate in beats per minute is given by the formula Heart rate = 65 + 53 / (4t + 1) where t is the number of minutes after the start of a cool-down period. Find the runner’s heart rate in 10 minutes. When is the runner’s heart rate equal to 68 beats per minute? \r<BR>\n" );
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document.write( "I tried to substitute 10 for \"t\" because it said t represents the minutes. I tried to solve it like that but got a answer 4718/41. Could you please help me set this equation up so I can learn how to do it and how to get the answer. Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #218349 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=218349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A runner’s heart rate in beats per minute is given by the formula Heart rate = 65 + 53 / (4t + 1) where t is the number of minutes after the start of a cool-down period. Find the runner’s heart rate in 10 minutes.<BR>\n" );
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document.write( "H.R. = 65 + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=53%2F%284%2810%29%2B1%29 ALIGN=MIDDLE  ALT=\"53%2F%284%2810%29%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "H.R. = 65 + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=53%2F41 ALIGN=MIDDLE  ALT=\"53%2F41\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "H.R. = 65 + 1.3<BR>\n" );
document.write( "H.R. = 66.3<BR>\n" );
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document.write( "When is the runner’s heart rate equal to 68 beats per minute?<BR>\n" );
document.write( "65 + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=53%2F%284t%2B1%29 ALIGN=MIDDLE  ALT=\"53%2F%284t%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 68<BR>\n" );
document.write( "Subtract 65 from both sides<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=53%2F%284t%2B1%29 ALIGN=MIDDLE  ALT=\"53%2F%284t%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 68 - 65<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=53%2F%284t%2B1%29 ALIGN=MIDDLE  ALT=\"53%2F%284t%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 3<BR>\n" );
document.write( "Multiply both sides (4t+1)<BR>\n" );
document.write( "53 = 3(4t+1)<BR>\n" );
document.write( "53 = 12t + 3<BR>\n" );
document.write( "53 - 3 = 12t<BR>\n" );
document.write( "50 = 12t<BR>\n" );
document.write( "t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=50%2F12 ALIGN=MIDDLE  ALT=\"50%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 4.2 minutes<BR>\n" );
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