A person is canoeing on a river. Her overall speed is 3.4 mile(s) per hour up river and 5.6 mile(s) per hour down river. Find the speed of the river's current and the speed the person can paddle in still water.

a) , b)

Step-by-step explanation:

Overall speeds up river and down river are modelled by following expressions:

Up River

Down River

After some algebraic manipulations, speeds are found:

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol