document.write( "Question 150076: Two planes leave O'Hare Airport Chicago at the came time. One flies directly east at 540 miles per hour. the other flies directly west at 720 miles per hour. How long will it take them to be 1890 miles apart? \n" ); document.write( "
Algebra.Com's Answer #110168 by ankor@dixie-net.com(22740)\"\" \"About 
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Two planes leave O'Hare Airport Chicago at the came time. One flies directly east at 540 miles per hour. the other flies directly west at 720 miles per hour. How long will it take them to be 1890 miles apart?
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\n" ); document.write( "Let t = time (in hrs) that the planes are 1890 mi apart
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\n" ); document.write( "Write a distance equation: dist = speed * time
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\n" ); document.write( "540t + 720t = 1890
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\n" ); document.write( "1260t = 1890
\n" ); document.write( "t = \"1890%2F1260\"
\n" ); document.write( "t = 1.5 hrs
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\n" ); document.write( "Check solution
\n" ); document.write( "1.5 * 540 = 810
\n" ); document.write( "1.5 * 720 = 1080
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\n" ); document.write( "total dist= 1890 \n" ); document.write( "
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