document.write( "Question 72113This question is from textbook Algebra and Trigonometry: Structure and Method
\n" ); document.write( ": Helped by a strong jet stream, a Los Angeles-to-Boston plane flew 10% faster than usual and made the 4400km trip in 30 min. less time than usual. At what speed does the plane usually fly? \n" ); document.write( "
Algebra.Com's Answer #51541 by ankor@dixie-net.com(22740)\"\" \"About 
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Helped by a strong jet stream, a Los Angeles-to-Boston plane flew 10% faster than usual and made the 4400km trip in 30 min. less time than usual. At what speed does the plane usually fly?
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\n" ); document.write( "Let s = normal speed
\n" ); document.write( " 1.1s = the jet stream assisted speed
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\n" ); document.write( "Write a time equation Time = dist/speed:
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\n" ); document.write( "Jet stream time + half hr = normal time
\n" ); document.write( "\"4400%2F1.1s+%2B+.5\" = \"4400%2Fs\"
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\n" ); document.write( "Multiply equation by 1.1s and you have:
\n" ); document.write( "4400 + 1.1s(.5) = 1.1*4400
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\n" ); document.write( "4400 + .55s = 4840
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\n" ); document.write( ".55s = 4840 - 4400
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\n" ); document.write( "s = 440/.55
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\n" ); document.write( "s = 800 km/hr normal speed
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\n" ); document.write( "Check solution using the time:
\n" ); document.write( "4400/(1.1*800) + .5 = 4400/800
\n" ); document.write( "5 + .5 = 5.5 \n" ); document.write( "
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