document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=681023>Question 681023</A>: <I><SPAN STYLE=\"word-break: break-all;\"> it took debra 4 hours to complete a 12-mile walk. What was her average speed in miles per hour?\r<BR>\n" );
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document.write( "<br>An easy way to remember the formula for this is to remember that \"speed\"=\"miles per hour\".  This can be written as Speed = miles/hour.<br>\r<BR>\n" );
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document.write( "<br>Another more popular way is the distance formula.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=rt ALIGN=MIDDLE  ALT=\"d=rt\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Where d = distance<BR>\n" );
document.write( "r=rate (or speed)<BR>\n" );
document.write( "t=time<BR>\n" );
document.write( "We want to know what rate is, so if we solved this equation for r, we get:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=rt ALIGN=MIDDLE  ALT=\"d=rt\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2Ft=rt%2Ft ALIGN=MIDDLE  ALT=\"d%2Ft=rt%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2Ft=r ALIGN=MIDDLE  ALT=\"d%2Ft=r\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Which is equivalent to the first equation.<BR>\n" );
document.write( "Your d = 12 and t=4, substitute it into the formula:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=12%2F4 ALIGN=MIDDLE  ALT=\"r=12%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=3 ALIGN=MIDDLE  ALT=\"r=3\"   DISABLED_style= \"max-width:90%; height:auto;\" >miles per hour<BR>\n" );
document.write( "Hope that helped.  Happy Calculating!!! \r<BR>\n" );
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