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Expert: Sherry Wallin - 11/16/2011


Question
Julio left the hospital and drove toward the recycling plant at an average speed of 55 mph.  Jasmine left four hours later and drove the opposite direction with an average speed of 65 mph.  How long does Jasmine need to drive before they are 340 mi. apart?

Answer
Jessi~

Let t = Jasmine's time driving and Julio's time is t + 4. The distances are the same and we know that d = rt thus 55(t+4) + 65 t = 340 => 55t + 220 + 65t = 340 => 120t = 120 => t = 1. This means that Julio drove for 5 hours at 55mph = 275 and Jasmine drove for 1 hour at 65mph, hence 275 + 65 = 340

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Sherry Wallin

Expertise

I can answer most questions up through Calculus and some in Number Theory and Abstract Algebra.

Experience

I have had my Bachelor's Degree since 1987 and have been a teacher since 1988. I earned my Masters Degree in Mathematics May 2010. I have been teaching at the same community college since 2002.

Education/Credentials
I have taught 12 years at the community college level, medical college, and technical college as well as a high school instructor and alternative education instructor and charter school instructor.

Awards and Honors
Master's GPA 3.56 Bachelor's GPA 3.34 Post grad work not degree related GPA 4.0

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