document.write( "Question 811722: Noah drives 40 miles at a certain speed. Hitting serious traffic, he is forced to drive at a speed that is 60 mph slower. He drives at this new speed for 50 miles. If the entire trip takes 3 hours, what is his speed during each part of the trip? \n" ); document.write( "
Algebra.Com's Answer #488878 by mananth(16946)\"\" \"About 
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Noah drives 40 miles --------------x mph speed.
\n" ); document.write( "50 miles ----------------(x-60) mph,
\n" ); document.write( "the entire trip takes 3 hours, \r
\n" ); document.write( "\n" ); document.write( "time part I + time part II=3\r
\n" ); document.write( "\n" ); document.write( "40/x + 50/(x-60)= 3\r
\n" ); document.write( "\n" ); document.write( "multiply by x(x-60)\r
\n" ); document.write( "\n" ); document.write( "40(x-60)+50x=x(x-60)*3\r
\n" ); document.write( "\n" ); document.write( "40x-2400+50x=3x^2-180x\r
\n" ); document.write( "\n" ); document.write( "3x^2-270x+2400=0\r
\n" ); document.write( "\n" ); document.write( "/3
\n" ); document.write( "x^2-90x+800=0\r
\n" ); document.write( "\n" ); document.write( "x^2-80x-10x+800=0\r
\n" ); document.write( "\n" ); document.write( "x(x-80)-10(x-80)=0
\n" ); document.write( "(x-80)(x-10)=0
\n" ); document.write( "x=80 OR 10\r
\n" ); document.write( "\n" ); document.write( "ignore 10
\n" ); document.write( "
\n" ); document.write( "Noah drives 40 miles --------------80 mph
\n" ); document.write( "50 miles ----------------20 mph,
\n" ); document.write( "
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