Answer:
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb


keep in mind, that "t" is the time when the train at A station, left towards B station
they met, at some time "t", and by the time that happened, train from A
which started 3 hours earlier, had already covered "d" distance,
whatever that is
and the train coming from B, covered, 600-d, or the difference
Answer:
B and E
aka
E-F and E-D
C-B and C-D
Step-by-step explanation:
It would be 10 the slope is always with the x