The first train leaves a station at a speed of 72 mph. the second train leaves the same station 1 hour later and follows the same route at a faster rate of 90 mph. in how many hours will the second train catch up with the first?

Equation:

distance = distance

72x = 90(x-1)

72x = 90x-90

18x = 90

x = 5 hrs

x-1 = 4 hrs

45

step-by-step explanation:

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !