Answer:
2 miles
Step-by-step explanation:
Their combined speed (speed of closure) is 80 mph + 40 mph = 120 mph.
120 mi/h = 120 mi/(60 min) = 2 mi/min
The distance between the trains at the 1-minute mark is ...
(1 min) · (2 mi/min) = 2 mi
They were warned when two miles apart.
Consecutive terms in an arithmetic sequence differ by a constant

. So



Denote the

-th term in the sequence by

. Now that

, we have

which means
Suppose, we are given
two points as
F as (x1, y1)
H as (x2, y2)
assume it divides in m/n
we can use formula

now, we are given points as
F=(x1, y1)=(4,8)

H=(x2, y2)=(10,12)


so,

now, we can find


so, point is
.................Answer
Answer:
n=45
Step-by-step explanation:
30=1, 2, 3, 5, 6, 10, 15 and 30.
45=1, 3, 5, 9, 15 and 45.
-hope it helps