Answer:
After 900 minutes
Step-by-step explanation:
when we convert the velocities of the ships into miles/ min we get


The equations determining the distances of the ships from the port M (set at x=0) are
(for 45mph ship)
(for 36mph ship)
The solution to these equation lie at t= 900 minutes; therefore the two ships will meet 900 minutes after the departure of the first ship.
Because the equation is a positive number lower than the original
Answer:

Step-by-step explanation:
The sum of 83 and a number would be
as an expression, where
is "said number".
There would be 160 people.
(.75)=(120)
(.25)=(40) (Divide by 3)
(1)=(160) (Multiply by 4)