Recall your d = rt, distance = rate * time.
keeping in mind that, the distance upstream as well as downstream is the same, 90 miles, let's say the boat has a speed rate of "b", thus when the boat was going upstream, it really wasn't going "b" fast, it was going "b - 8", because the 8mph speed of the current is subtracting from it. Likewise, when the boat was going downstream, it wasn't going "b" fast either, because the current was adding to it, since it was going with the current, then it was really going "b + 8" fast.
now, let's notice the trip took a total of 6 hours, thus, if the trip downstream took say "t" hours, then the trip upstream took the slack from 6 and "t", that is, it took "6 - t" hours.


since the rate of speed wouldn't be a negative unit, then is not -2.
The answer is 1236 and I know why I did it
Answer: sorry I also need help with this
Step-by-step explanation:
You cannot because distance cannot be negative.
Hope this helps you!
Answer:
3520 Yards
Step-by-step explanation:
1 Mile = 1760 Yards