document.write( "Question 711756: If you drove for 30 minutes at 60 mph and 10 minutes at 38 mph. What was your average speed for the trip? \n" ); document.write( "

Algebra.Com's Answer #437617 by Edwin McCravy(20059) $\"\"$ $\"About$

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document.write( "The other tutor used decimals and rounded off, making his answer off\r\n" );
document.write( "a little.  I'll use fractions.\r\n" );
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document.write( "We use two formulas:\r\n" );
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document.write( "Distance = Rate × Time\r\n" );
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document.write( "Average Rate = Total Distance ÷ Total Time\r\n" );
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document.write( "When you went 30 minutes (half an hour) at 60 mph,\r\n" );
document.write( "you went 60× = 30 miles  \r\n" );
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document.write( "When you went 10 minutes ( of an hour) at 38 mph,\r\n" );
document.write( "you went 38× =  =   =  miles \r\n" );
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document.write( "To find the total distance, we use the improper fraction for\r\n" );
document.write( "the distance at 38 mph \r\n" );
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document.write( "Total distance =  or  miles.\r\n" );
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document.write( " Total time =  or  hr.\r\n" );
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document.write( "Average Rate = Total Distance ÷ Total Time\r\n" );
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document.write( "We will use the improper fraction for the total miles  \r\n" );
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document.write( "Average Rate = ÷mph.\r\n" );
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document.write( "Edwin

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