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Tables with perfect squares |
2005-11-30 |
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Craig pose la question :
A table consists of eleven columns. Reading across the first row of the table we find the numbers 1991, 1992, 1993,..., 2000, 2001. In the other rows, each entry in the table is 13 greater than the entry above it, and the table continues indefinitely. If a vertical column is chosen at random, then the probability of that column containing a perfect square is:
Claude Tardif lui répond. |
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The square root of i |
2005-11-30 |
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Kevin pose la question :
If the square root of -1 is i, what is the square root of i?
How can you find the log of a negative number?
What is the log of -1?
Claude Tardif lui répond. |
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L'objectif est de trouver |
2005-11-27 |
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Sandie pose la question :
L'objectif est de trouver "a et n" :
2 = a.0,6-n
0,3 = a.2-n
Claude Tardif lui répond. |
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The sum of n consecutive integers |
2005-11-27 |
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Craig pose la question :
If 875 is expressed as the sum of n consecutive integers (n > 1), then the number
of possible values of n is?
Possible Answers:
A) 15
B) 8
C) 7
D) 16
E) 4
Penny Nom lui répond. |
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what is 5'7 |
2005-11-26 |
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A student pose la question :
what is 5'7" inches in cm?
Harley Weston lui répond. |
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Resizing a polygon |
2005-11-26 |
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Anthony pose la question :
I am currently working on a mapping program in which polygons, rectangles, circles, etc... are rotated, moved, and resized. Recently, I used the rotation conversion formula to rotate the items n degrees/radians by using the point and the center point of the shape.
Currently, I am working on resizing the shape (length and/or width) while still trying to maintain the integrity of the shape. I basically want to decrease or increase the y value by 1 in order to resize the length and I want to decrease or increase the x value by 1 in order to resize the width.
The corresponding x and y values either increase by 1, stay the same, or decrease by 1.
Is it possible to use just the point and center of the shape in order to calculate this resizing?
What can I use to accomplish this task?
Chris Fisher lui répond. |
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Common fractions to decimals |
2005-11-25 |
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A student pose la question :
how do u turn 8 over23 into a decimal and how do u turn 8 over 29 into a decimal
Penny Nom lui répond. |
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The sum of the angels in a triangle |
2005-11-25 |
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Rachel pose la question :
how do you prove, without knowing any of the measurements or degrees, that the three angles of a triangle equal 180? what are the steps for proving that?
Penny Nom lui répond. |
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Find the measure of each angle |
2005-11-25 |
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Bev pose la question :
in triangle abc, angle a is four times as large as angle b, angle c measures 20 degrees less than angle b. find the measure of each angle.
Penny Nom lui répond. |
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Adding improper fractions |
2005-11-25 |
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Paula pose la question :
I would like a simple step by step explanation on how to add improper fractions.
Penny Nom lui répond. |
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BEDMAS |
2005-11-24 |
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Judy pose la question :
My name is Judy and I am a grade 6 teacher.
We have just started our lessons on the order of operations and my students have asked me why we have BEDMAS and what is the logic to it.
Is there a reason that that we do math in this particular order?
Who invented this rule or how was it decided on and when?
Walter Whiteley lui répond. |
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Four 25-sided dice |
2005-11-24 |
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dan pose la question :
Simply put, I am curious to find the likelyhood of each possibility (4-100) if I were to roll 4 25-sided die. It seems to start off simply, as 1, 4, 10, 20...following the inside diagonal of Pascal's triangle. But as soon as i reach the point where the sum is greater than the number of sides, Pascal's no longer seems to work. I would be greatly appreciated if I could be informed of the proper formula to find this answer, or perhaps if my theory of doing it is wrong.
Andrei Volodin and Shaun Fallat lui répond. |
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Numbers with exactly 5 divisors |
2005-11-23 |
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Mary Lou pose la question :
Show the 10 numbers with exactly 5 divisors.
Penny Nom lui répond. |
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100, 000 or 100 000 |
2005-11-21 |
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Jacqui pose la question :
I am a parent of a grade 6 student and need to confirm that commas are no longer used when writing numbers (the Canadian method). For example, how do you write one hundred thousand? 100, 000 or 100 000
Diane Hanson and Harley Weston lui répond. |
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Graphing two lines |
2005-11-20 |
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A student pose la question :
About y = 5x + 24 and y = -3x - 8
1. Graph both equations on the same set of axes. When you made your graph, how did you choose the range of x and y values?
2.Find the point of intersection for the graphs.
3. Test the point of intersection you found by substituting its coordinates into the equations. Do the coordinates fit the equations exactly?
Penny Nom lui répond. |
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