document.write( "Question 357658: A bus traveled 180 miles. If weather conditions had been better, it could have driven 5 miles an hour faster and completed the trip in 30 minutes less time. How fast did the bus travel? \n" ); document.write( "

Algebra.Com's Answer #255333 by robertb(5830) $\"\"$ $\"About$

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$\"180%2Fr+-+180%2F%28r%2B5%29+=+1%2F2\"$ ,
\n" ); document.write( " $\"180%281%2Fr-1%2F%28r%2B5%29%29+=+1%2F2\"$ ,
\n" ); document.write( " $\"360%2A%285%2F%28r%28r%2B5%29%29%29+=+1\"$ ,
\n" ); document.write( " $\"1800+=+r%5E2%2B5r\"$ ,
\n" ); document.write( " $\"r%5E2%2B5r-1800=0\"$ ,
\n" ); document.write( " $\"%28r-40%29%28r%2B45%29+=+0\"$ ,
\n" ); document.write( "Therefore r = 40 miles per hour. \n" ); document.write( "

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