Atrain leaves the station traveling west at a constant rate of 45 mph. an express train leaves the same station 1 hour later heading west on the same route, traveling at a constant rate of 60 mph. how many hours will the first train have been traveling when the express train catches up to it?

a. 3
b. 4
c. 5
d. 6

B-4

Step-by-step explanation:

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is symmetric about the line y = 120,000.

step-by-step explanation:

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled