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?

math  Anonymous, Thursday, October 18, 2007 at 9:50pm
D=RT
450=60(8x)+50x

math  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)?

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

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