Posted by **Cecilia** on Thursday, October 18, 2007 at 9:42pm.

Ronald made a trip of 450 miles in 8 hours. Before noon he avg. 60 miles per hour, and after noon he avg. 50 miles per hour. At what time did he begin his trip and when did it end?

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**Anonymous**, Thursday, October 18, 2007 at 9:50pm
D=RT

450=60(8-x)+50x

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**Anonymous**, Thursday, October 18, 2007 at 11:01pm
If I told you Ronald traveled 3 hours after noon, how long did he traveled before noon (given he traveled both before and after noon in 8 hours)?

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**Cecilia**, Thursday, October 18, 2007 at 11:04pm
5 hours

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**Anonymous**, Thursday, October 18, 2007 at 11:07pm
That is why it is 8-x. Do you understand?

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