using quadratic formula...

The speed of the current in a canal is 4mph. It takes twice as long for a houseboat to go 18 miles upstream as it does for it to go downstream. Find the speed of the boat in still water.

Question

using quadratic formula...

The speed of the current in a canal is 4mph. It takes twice as long for a houseboat to go 18 miles upstream as it does for it to go downstream. Find the speed of the boat in still water.

anonymous · Answer

Not even sure how to write the problem to solve

anonymous · Answer

ohhhh maybe he got it
6.0 or -2.3

anonymous · Answer

oops 6.8

mathmate · Answer

18 miles /(s-4)=2*18/(s+4)
Cross multiply and solve for s.
The answer is quite a bit bigger than 6.8.

anonymous · Answer

he is stumped... scanning what he did so far

anonymous · Answer

number 37