document.write( "Question 247171: A student walks and jogs to college each day. She averages 5km/h walking and 9km/h jogging. The distance from home to college is 8km, she makes the trip in 1 hour. How far does the student jog? \n" ); document.write( "
Algebra.Com's Answer #180433 by ankor@dixie-net.com(22740)\"\" \"About 
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averages 5km/h walking and 9km/h jogging.
\n" ); document.write( "The distance from home to college is 8km, she makes the trip in 1 hour.
\n" ); document.write( " How far does the student jog?
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\n" ); document.write( "Let x = jogging dist
\n" ); document.write( "then
\n" ); document.write( "(8-x) = walking dist
\n" ); document.write( ":
\n" ); document.write( "Write a time equation: time = dist/speed
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\n" ); document.write( "jog time + walk time = 1 hr
\n" ); document.write( "\"x%2F9\" + \"%288-x%29%2F5\" = 1
\n" ); document.write( "Multiply by 45, results:
\n" ); document.write( "5x + 9(8-x) = 45
\n" ); document.write( "5x - 72 - 9x = 45
\n" ); document.write( "5x - 9x = 45 - 72
\n" ); document.write( "-4x = -27
\n" ); document.write( "x = \"%28-27%29%2F%28-4%29\"
\n" ); document.write( "x = +6.75 km jogging
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\n" ); document.write( "Check solution
\n" ); document.write( "8 - 6.75 = 1.25 km walking
\n" ); document.write( "Walk time = 1.25/5 = .25 hr
\n" ); document.write( "Jog time = 6.75/9 = .75 hr
\n" ); document.write( "---------------------------
\n" ); document.write( "total time for both = 1 hr \n" ); document.write( "
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