Homework Help: Algebra

Posted by Amber on Monday, January 14, 2008 at 11:03pm.

on a canoe trip, Rita paddled upstream (against the current) at an average speed of 2 mi/hr relative to the riverbank. on the return trip downstream (with the current), her average speed was 3 mi/hr. find rita's paddling speed in still water and the speed of the river's current.

dealing w/- substitution and elimination

Algebra - bobpursley, Tuesday, January 15, 2008 at 12:05am
let w be the water speed
let b be the boat speed in still water.

b-w=2
b+w=3

solve. I would add the two equations to eliminate w.
Algebra - Navi, Thursday, July 28, 2011 at 6:46am
b-w=2

b+w=3 (transpose)
b=3-w (substitute)
3-w-w=2 (combine like terms)
-2w=-1 (cancel -2)
w= 1/2

Answer this Question

Related Questions

Math - Dayle is paddling his canoe upstream, against the current, to a fishing ...
Algebra - Cody’s motorboat took 3 hr to make a trip downstream with a 6-mph...
algebra - A motorboat can maintain a constant speed of 24 mph relative to the ...
algebra - a motorboat can maintain a constant speed of 11 miles per hour ...
Algebra - A motorboat can maintain a constant speed of 26 miles per hour ...
math 116 - A Coast-Guard patrol boat travels 4 hr on a trip downstream with a 6-...
NEED HELP!! ALGEBRA - A motorboat can maintain a constant speed of 26 miles per ...
college algebra - A boat can maintain a constant speed of 34 mph relative to the...
ALGEBRA - Jim paddles a canoe upstream at a rate o 3mi/hr. Traveling downstream...
Math - A kayaker paddled 2 hours with a 6 mph current in a river. The return ...

For Further Reading

First Name:
School Subject:
Answer: