Ok, the table is as follows:
rate(mi/h) Time(h) Distance(mi)
To work 55 t 55t
To home 40 ?
The distance is going to equal the rate time. Since we have the rate of the commute home, we need the time in order to find the distance. They give us a time of 1.25 hours for the round trip to work and back home. Since the time to work is t... then that means the time home is 1.25 - t. Since the distance is the rate time, then
distance = 40(1.25 - t)
So the expression to fill in the missing distance is...
40(1.25 - t)
