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Factoring trinomials that are squared |
2000-04-17 |
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From A student:
I have a question that I really need an answer to. I need help with factoring trinomials that are squared.
Answered by Penny Nom. |
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Uniting algebra and geometry |
2000-04-16 |
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From Beth:
Who is the mathmatician that united algebra and geometry???
Answered by Claude Tardif. |
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Finding a Quadratic Equation given the roots |
2000-04-16 |
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From A secondary student:
How do I find the equation for the quadratic with roots at 2-i and its complex conjugate?
Answered by Harley Weston. |
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Sample variance |
2000-04-16 |
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From Jonathan Freeman:
I was just reading your article entitled "A Note on Standard Deviation" I'm now teaching a unit on s.d. and my students were wondering why one uses a denominator of n for a population and n-1 for a sample. I saw in your article that this is because "[the quantity] tends to underestimate sigma... and other technical reasons." To which my students again asked... "Why?" Could you please elaborate a bit on the "other technical reasons" perhaps in terms a high school senior (or their teacher...) could understand?
Answered by Harley Weston. |
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All the roots of x^6 - 64 |
2000-04-15 |
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From Dakota:
Find ALL zeros of P(x) = x 6 - 64
Answered by Walter Whiteley. |
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The area of a triangle using calculus |
2000-04-15 |
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From Todd Bowie :
Hi, I am not a student but am reviewing calculus for an upcoming interview. I would like to know how to derive the area of a triangle using calculus. Thanks!
Answered by Patrick Maidorn. |
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Rounding |
2000-04-15 |
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From Tawana Brown:
I was uncertain as to whether a number such as 85.25 rounding to the nearest tenth would be 85.3 or 85.2. I thought I had heard somewhere that if 5 is the last number that you don't round up. But I have also heard that anything 5 and above you do round up. It's been awhile since I've done rounding, so I need a refresher course.
Answered by Walter Whiteley and Harley Weston. |
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Job outlook |
2000-04-12 |
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From Shelby Faust:
what is the future demand, in numbers, of a secondary mathematics teacher? what are the projected costs for this career? what technology skills will be needed for this career?
Answered by Walter Whiteley. |
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Logs |
2000-04-12 |
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From Jessica:
Write as a single log 3ln x - 2ln(y+e) + 5ln(x-12) - 4ln y
Answered by Harley Weston. |
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Infinite sets |
2000-04-12 |
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From Brian Provost:
Here's the deal: There are an infinite amount of integers (1,2,3...). Agreed? There are an infinite amount of even integers, too (2,4,6...). Agreed? By convention, infinity equals infinity. Yet common sense tells us there are obviously more integers than there are even integers. Prove this to be true mathematically.
Answered by Harley Weston. |
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Natural numbers |
2000-04-12 |
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From Sara:
What is a natural number???
Answered by Penny Nom. |
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Estimates |
2000-04-11 |
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From Sue Jordan :
I am looking for examples of estimates for underestimating and overestimating. When would you do each one. For my child age 11 6th grade.
Answered by Penny Nom. |
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Geometric sequences |
2000-04-11 |
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From Jodie:
I am in a grade ten principles class and was taught how to do geometric sequences and series but no one in my class understood what we were taught. Our teacher is one of few to use the new curriculum which used to be the grade twelve curriculum. Could you please explain to me how to do geometric sequences and how to find the different terms and sums. Thank you very much!
Answered by Harley Weston. |
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Magic triangles |
2000-04-11 |
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From Sandy:
My tutoring student brought math homework today in the form of a "magic triangle". There are three spaces along each side for missing numbers. The sums of the numbers along each of the 3 sides should be the same. Use the numbers 4 through 9. Don't use any number more than once. The sum of the numbers on each side should be 20. What is the logic behind solving a problem of this kind?
Answered by Claude Tardif and Harley Weston. |
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White and blue paint |
2000-04-09 |
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From Lauren Emerson :
A truck full of cans of blue and white paint flips over on the road. There are dots of blue and white paint everywhere. Prove that two dots of the same color paint are exactly pi feet apart.
Answered by Penny Nom. |
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