document.write( "Question 903851: A tour bus leaves Sacramento every Friday evening at 5:00 PM, for a 270-mile trip to Las Vegas. This week, however, the bus leaves at 5:30PM. To arrive in Las Vegas on time, the driver drives 5 miles per hour faster than usual. At what speed does she usually drive? \n" ); document.write( "
Algebra.Com's Answer #548350 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+t+\" = the bus's normal time
\n" ); document.write( "in hrs to make the trip
\n" ); document.write( "\"+270%2Ft+\" = the bus's normal speed
\n" ); document.write( "---------------------------------
\n" ); document.write( "\"+270+=+%28+270%2Ft+%2B+5+%29%2A%28+t+-+.5+%29+\"
\n" ); document.write( "\"+270+=+270+%2B+5t+-+135%2Ft+-+2.5+\"
\n" ); document.write( "\"+0+=+5t+-+135%2Ft+-+2.5+\"
\n" ); document.write( "\"+5t+-+2.5+-+135%2Ft+=+0+\"
\n" ); document.write( "\"+5t%5E2+-+2.5t+-+135+=+0+\"
\n" ); document.write( "\"+50t%5E2+-+25t+-+1350+=+0+\"
\n" ); document.write( "\"+2t%5E2+-+t+-+54+=+0+\"
\n" ); document.write( "----------------------
\n" ); document.write( "\"+t+=+%28+-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+\"
\n" ); document.write( "\"+a+=+2+\"
\n" ); document.write( "\"+b+=+-1+\"
\n" ); document.write( "\"+c+=+-54+\"
\n" ); document.write( "\"+t+=+%28+-%28-1%29+%2B-+sqrt%28+%28-1%29%5E2+-+4%2A2%2A%28-54%29+%29%29+%2F+%282%2A2%29+\"
\n" ); document.write( "\"+t+=+%28+1+%2B-+sqrt%28+1+%2B+432+%29%29+%2F+4+\"
\n" ); document.write( "\"+t+=+%28+1+%2B-+sqrt%28+433+%29%29+%2F+4+\"
\n" ); document.write( "\"+t+=+%28+1+%2B+20.809+%29+%2F+4+\"
\n" ); document.write( "\"+t+=+21.809+%2F+4+\"
\n" ); document.write( "\"+t+=+5.452+\"
\n" ); document.write( "\"+270%2Ft+\" = the bus's normal speed
\n" ); document.write( "\"+270%2F5.452+=+49.523+\"
\n" ); document.write( "The bus's normal speed was 49.523 mi/hr
\n" ); document.write( "------------
\n" ); document.write( "check:
\n" ); document.write( "\"+270+=+%28+270%2Ft+%2B+5+%29%2A%28+t+-+.5+%29+\"
\n" ); document.write( "\"+270+=+%28+270%2F5.452+%2B+5+%29%2A%28+5.452+-+.5+%29+\"
\n" ); document.write( "\"+270+=+%28+49.523+%2B+5+%29%2A4.952+\"
\n" ); document.write( "\"+270+=+54.523%2A4.952+\"
\n" ); document.write( "\"+270+=+269.9998+\"
\n" ); document.write( "close enough
\n" ); document.write( "Hope I got it\r
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