Applications of Rational Expressions
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Lesson Summary:
In this lesson on applications of rational expressions, viewers will learn to solve word problems that involve equations with rational expressions. The lesson provides examples, such as calculating how long it will take two people working together to paint two rooms or drain two-thirds of a pool. Viewers will also learn how to set up equations and use task rate to determine the time it will take to complete a task.
Lesson Description:
Application / word problems involving rational expressions / fractions.
Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.
Questions answered by this video:
- How do you solve word problems with rational expressions?
- If one person paints a room in 6 hours, and another person paints the room in 4 hours, how long does it take them if they paint together?
- If one pump drains a pool in 10 hours and another pump drains a pool in 15 hours, how long does it take them together?
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Staff Review
A really useful problem is discussed that you see a lot in math classes. Two people are painting a room together, and you have to find out how long it takes them to paint two rooms. A must-see if you want to always remember how to do this problem. The second problem is very similar and works almost the same way.
