document.write( "Question 972299: Paul travels from a to b at an average speed of 90 km/h
\n" ); document.write( "He travels for \"T\" hours
\n" ); document.write( "Mary travels the same journey at an average speed of 70 km/h
\n" ); document.write( "She travels for 1 hour longer than Paul.
\n" ); document.write( "what is the value of T? \n" ); document.write( "
Algebra.Com's Answer #594724 by ankor@dixie-net.com(22740)\"\" \"About 
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Paul travels from a to b at an average speed of 90 km/h
\n" ); document.write( "He travels for \"T\" hours
\n" ); document.write( "Mary travels the same journey at an average speed of 70 km/h
\n" ); document.write( "She travels for 1 hour longer than Paul.
\n" ); document.write( "what is the value of T?
\n" ); document.write( ":
\n" ); document.write( "T = Paul's travel time
\n" ); document.write( "then
\n" ); document.write( "(t+1) = Mary's travel time (traveled 1 hr longer)\r
\n" ); document.write( "\n" ); document.write( "Write a distance equation: dist = speed * time
\n" ); document.write( "Paul's dist = Mary's dist
\n" ); document.write( "90t = 70(t+1)
\n" ); document.write( "90t = 70t + 70
\n" ); document.write( "90t - 70t = 70
\n" ); document.write( "20t = 70
\n" ); document.write( "t = 70/20
\n" ); document.write( "t = 3.5 hrs
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Confirm this by finding the distance each traveled, should be the same
\n" ); document.write( "90*3.5 = 315 mi
\n" ); document.write( "70*4.5 = 315 mi \n" ); document.write( "
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