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Tables with perfect squares |
2005-11-30 |
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From Craig:
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:
Answered by Claude Tardif. |
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The square root of i |
2005-11-30 |
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From Kevin:
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?
Answered by Claude Tardif. |
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L'objectif est de trouver |
2005-11-27 |
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From Sandie:
L'objectif est de trouver "a et n" :
2 = a.0,6-n
0,3 = a.2-n
Answered by Claude Tardif. |
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The sum of n consecutive integers |
2005-11-27 |
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From Craig:
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
Answered by Penny Nom. |
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what is 5'7 |
2005-11-26 |
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From A student:
what is 5'7" inches in cm?
Answered by Harley Weston. |
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Resizing a polygon |
2005-11-26 |
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From Anthony:
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?
Answered by Chris Fisher. |
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Common fractions to decimals |
2005-11-25 |
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From A student:
how do u turn 8 over23 into a decimal and how do u turn 8 over 29 into a decimal
Answered by Penny Nom. |
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The sum of the angels in a triangle |
2005-11-25 |
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From Rachel:
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?
Answered by Penny Nom. |
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Find the measure of each angle |
2005-11-25 |
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From Bev:
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.
Answered by Penny Nom. |
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Adding improper fractions |
2005-11-25 |
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From Paula:
I would like a simple step by step explanation on how to add improper fractions.
Answered by Penny Nom. |
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BEDMAS |
2005-11-24 |
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From Judy:
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?
Answered by Walter Whiteley. |
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Four 25-sided dice |
2005-11-24 |
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From dan:
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.
Answered by Andrei Volodin and Shaun Fallat. |
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Numbers with exactly 5 divisors |
2005-11-23 |
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From Mary Lou:
Show the 10 numbers with exactly 5 divisors.
Answered by Penny Nom. |
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100, 000 or 100 000 |
2005-11-21 |
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From Jacqui:
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
Answered by Diane Hanson and Harley Weston. |
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Graphing two lines |
2005-11-20 |
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From A student:
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?
Answered by Penny Nom. |
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