document.write( "Question 830443: A car and bus both completed a 240 mile trip. The car averaged 10 mph faster than the bus and completed the trip in 48 minutes less time then the bus. Find the average rate, in miles per hour, of the bus. \n" ); document.write( "
Algebra.Com's Answer #501278 by josgarithmetic(39630)\"\" \"About 
You can put this solution on YOUR website!
r the speed for the bus
\n" ); document.write( "h the time in HOURS for the bus
\n" ); document.write( "48 minutes is \"4%2F5\" hour\r
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\n" ); document.write( "\n" ); document.write( "________________speed_______________time_____________miles
\n" ); document.write( "Car_____________r+10________________h-(4/5)________240
\n" ); document.write( "Bus______________r___________________h_______________240\r
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\n" ); document.write( "\n" ); document.write( "You could generalize everything and solve this all in symbols before using given values. Try this:\r
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\n" ); document.write( "\n" ); document.write( "________________speed_______________time_____________miles
\n" ); document.write( "Car_____________r+v________________h-p_______________d
\n" ); document.write( "Bus______________r___________________h_______________d\r
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\n" ); document.write( "\n" ); document.write( "Your equations from this begin as:
\n" ); document.write( "\"%28r%2Bv%29%28h-p%29=d\" and \"rh=d\";
\n" ); document.write( "If you take the simpler equation as \"h=d%2Fr\", and then start working with the car's equation, substituting for h and for rh, will allow you to get a quadratic equation, a very simple-looking one, in r. You could then use the general solution for a quadratic equation to get a formula for r.\r
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\n" ); document.write( "\n" ); document.write( "... just remember what your given values were and what you wanted to find.
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