Posted by Cecilia on .
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,
D=RT
450=60(8x)+50x 
math 
Cecilia,
Thank you so much for the equation  can u explain why we minus the 8 by x. I know it's the amount of time, can u clarify... thanks again

math 
Anonymous,
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,
5 hours

math 
Anonymous,
That is why it is 8x. Do you understand?

math 
Cecilia,
yes i do now  thank you again  i can go to sleep now!! bye thanks