Posted by belle on Sunday, September 23, 2012 at 7:15pm.
two trains leave the dallas port going in opposite directions. if one train goes 56 miles per hour, and the other goes 52 miles per hour how long will it take them to be 363 miles apart?
how do i set up this problem?

algebra 2  Reiny, Sunday, September 23, 2012 at 8:49pm
Use the standard formula
D = RT , (distance = rate x time)
let the time taken by each train be t hours
1st train went 56t miles
2nd train went 52t miles
56t + 52t = 363
108t = 363
t = 363/108 = 3.36111. hrs
= 3 hours and .36111(60) minute
= 3 hrs and appr 22 minutes

algebra 2  rajanae, Monday, September 24, 2012 at 2:01pm
give the domain and range of the relation x,2,8,0,3,and y,5,17,0,5,
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