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Adding and Subtracting Rational Expression  Problem 5
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
A common type of word problem in math is called a "work" word problem, where you're asked to find the total time it takes for two individuals to finish a job together, or perhaps if you know the time together, then how long it would take one individual. One way to set up a rational equation to solve this is to write the part person 1 can do in one hour times total time, plus the part person 2 can do in one hour times the total time, and set it equal to one. You'll need to find a common denominator and simplify the left side, but you can use this set up to solve for any variable in this scenario.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
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Sample Problems (6)
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Adding and Subtracting Rational Expression
Problem 1 6,841 viewsAdd and Simplify:
3x² + 6x x + 2 x + 2 
Adding and Subtracting Rational Expression
Problem 2 5,902 viewsSimplify:
7m − 2 − 5m − 6 m² + 3m + 2 m² + 3m + 2 
Adding and Subtracting Rational Expression
Problem 3 5,704 viewsSimplify:
4 + x² + x x + 3 x² + 4x + 3 
Adding and Subtracting Rational Expression
Problem 4 4,826 viewsSimplify:
x − x x² − 16 x² + 8x + 16 
Adding and Subtracting Rational Expression
Problem 5 489 views 
Adding and Subtracting Rational Expression
Problem 6 149 views
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