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Expert: Chanda Walker - 3/16/2009


Question
Rachel ran an average of 30 miles this week. She ran 8 miles on Monday. How many miles did she run on average the other four days of the week?

Answer
This problem is worded funny.  If the question is:

Rachel ran an average of 30 miles PER DAY this week.

Then here is the answer.

(8 + TWThF)/5 = 30
TWThF = 150 - 8
TWThF = 142

Average of TWThF = TWThF/4 = 35.5 miles


If the question is:
Rachel ran 30 miles this week.

8 + TWThF = 30
TWThF = 22

Average of TWThF = 22/4 = 5.5

My suspicion is that the first answer is the one they are looking for.  Let me know if I can help further.

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Chanda Walker

Expertise

I can answer word problems involving mathematics at the high school and college level. I particularly enjoy calculus word problems. Please don't just type the math problem without comments. If you don't tell me what problem your having, I can't help.

Experience

Have done word problems as a tutor and as a student of mathematics and physics for years.

Organizations
Sigma Xi

Education/Credentials
Optical Science PhD

Past/Present Clients
I've answered hundreds of questions here at AllExperts.com in algebra, physics and general math sections.

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