Question 272398
this is like two trips added together ___ r * t = d


60 (x) + 50 (7 - x) = 389


60x + 350 - 50x = 389


10x = 39 ___ x = 3.9 ___ 7 - x = 3.1


3.9 hr at 60 mph and 3.1 hr at 50 mph