Hi D =rt Both Jack and Frances traveling equal distances: Question states (55mph)t = (80mph)(t-5) 400 = 25t 400/25 = t = 16hr, Jack's time Frances time = 11hr checking: 55mph*16h = 80mph*11h = 880mi checks Wish You the Best in your Studies.
SPEED TIME DIST. JACK 55 x+5 d FRANCES 80 x d