document.write( "Question 637199: Two buses leave Houston at the same time and travel in opposite directions. One bus averages 55 mi/h and the other bus averages 45 mi/ h. When will they be 400 mi apart? \n" ); document.write( "
Algebra.Com's Answer #401495 by stanbon(75887)\"\" \"About 
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Two buses leave Houston at the same time and travel in opposite directions. One bus averages 55 mi/h and the other bus averages 45 mi/ h. When will they be 400 mi apart?
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\n" ); document.write( "They are separating at a rate of 55+45 = 100 mph
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\n" ); document.write( "Solve 400/100 = 4 hrs
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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