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Factoring trinomials that are squared |
2000-04-17 |
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A student pose la question :
I have a question that I really need an answer to. I need help with factoring trinomials that are squared.
Penny Nom lui répond. |
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Uniting algebra and geometry |
2000-04-16 |
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Beth pose la question :
Who is the mathmatician that united algebra and geometry???
Claude Tardif lui répond. |
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Finding a Quadratic Equation given the roots |
2000-04-16 |
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A secondary student pose la question :
How do I find the equation for the quadratic with roots at 2-i and its complex conjugate?
Harley Weston lui répond. |
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Sample variance |
2000-04-16 |
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Jonathan Freeman pose la question :
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?
Harley Weston lui répond. |
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All the roots of x^6 - 64 |
2000-04-15 |
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Dakota pose la question :
Find ALL zeros of P(x) = x 6 - 64
Walter Whiteley lui répond. |
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The area of a triangle using calculus |
2000-04-15 |
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Todd Bowie pose la question :
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!
Patrick Maidorn lui répond. |
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Rounding |
2000-04-15 |
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Tawana Brown pose la question :
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.
Walter Whiteley and Harley Weston lui répond. |
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Job outlook |
2000-04-12 |
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Shelby Faust pose la question :
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?
Walter Whiteley lui répond. |
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Logs |
2000-04-12 |
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Jessica pose la question :
Write as a single log 3ln x - 2ln(y+e) + 5ln(x-12) - 4ln y
Harley Weston lui répond. |
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Infinite sets |
2000-04-12 |
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Brian Provost pose la question :
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.
Harley Weston lui répond. |
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Natural numbers |
2000-04-12 |
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Sara pose la question :
What is a natural number???
Penny Nom lui répond. |
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Estimates |
2000-04-11 |
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Sue Jordan pose la question :
I am looking for examples of estimates for underestimating and overestimating. When would you do each one. For my child age 11 6th grade.
Penny Nom lui répond. |
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Geometric sequences |
2000-04-11 |
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Jodie pose la question :
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!
Harley Weston lui répond. |
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Magic triangles |
2000-04-11 |
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Sandy pose la question :
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?
Claude Tardif and Harley Weston lui répond. |
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White and blue paint |
2000-04-09 |
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Lauren Emerson pose la question :
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.
Penny Nom lui répond. |
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