Brightstorm is like having a personal tutor for every subject

See what all the buzz is about

Check it out
Don't Stop Learning Now!

Gain access to 3,500 HD videos.

Convince me!

Watch 1 minute preview of this video

or

Get Immediate Access with 1 week FREE trial
Your video will begin after this quick intro to Brightstorm.

Adding and Subtracting Rational Expressions - Problem 9 429 views

We use the relationship "distance equals rate times time" to work with word problems involving rates, traveling, time, and commonly, word problems about airplanes or boats traveling against and with a current. If you're asked "how long," one strategy is to solve for time, and write a sum of the time upstream with the time downstream. From there, if you know the boat's speed in still water, you can solve for the total time for the journey.

Transcript Coming Soon!