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About Steve Holleran
Expertise
I can help with all math questions from basic math to Calculus. Whether it`s consumer questions, or questions from high school or college students, I have probably dealt with it at some time in my career.

Experience
I have taught high school mathematics for the past 33 years in New Jersey. I am now retired in Florida.

Organizations
National Council of Teachers of Mathematics
Association of Mathematics Teachers of NJ
Teachers Teaching with Technology

You are here: Experts > Education > Secondary School Educators > Secondary School Educators > Algebra 1

Topic: Secondary School Educators

Expert: Steve Holleran
Date: 5/7/2008
Subject: Algebra 1

Question
Express, in terms of x, the mean of (4x^2-6), (2x^2+3x), and (-13x+3).

Answer
Hi Donna,

Okay, the mean is basically the average of the three expressions, so we have to add them, then divide by 3:

(4x^2 - 6) + (2x^2 + 3x) + (-13x + 3) = 6x^2 - 10x -3

Then dividing this by 3 gives : 2x^2 - (10/3)x - 1

That would be the mean.

Steve

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