document.write( "Question 450258: Chase was hauling a wide load out of Portland. At 7:00 a.m. he headed west from exit 139 at an average speed of 30 miles per hour. Jeremy headed west from the same exit at 10:00 a.m. in his Infinity. By 1:00 p.m. the same day Jeremy was 15 miles ahead of Chase. What was Jeremy's average speed? \n" ); document.write( "

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Chase was hauling a wide load out of Portland. At 7:00 a.m. he headed west from exit 139 at an average speed of 30 miles per hour. Jeremy headed west from the same exit at 10:00 a.m. in his Infinity. By 1:00 p.m. the same day Jeremy was 15 miles ahead of Chase. What was Jeremy's average speed?
\n" ); document.write( "..
\n" ); document.write( "let x=Jeremy's average speed
\n" ); document.write( "Jeremy's time of travel=10A-1.00P=3 hrs
\n" ); document.write( "Distance Jeremy traveled=distance Chase traveled + 15 miles
\n" ); document.write( "..
\n" ); document.write( "Chases' time of travel=7A-1.00P=6 hrs
\n" ); document.write( "Distance Chase traveled=speed*time traveled=30*6=180 miles
\n" ); document.write( "Distance Jeremy traveled=180+15=195 miles
\n" ); document.write( "Travel time*speed=distance
\n" ); document.write( "3x=195
\n" ); document.write( "x=65 mph
\n" ); document.write( "..
\n" ); document.write( "ans:
\n" ); document.write( "Jeremy's average speed=65 mph \n" ); document.write( "

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