46 articles trouvés pour ce sujet.
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Les tableaux de conversions |
2001-05-03 |
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Jean-Jacques pose la question : Sur quel site est il possible de trouver tous les tableaux de conversions de mètres,kg,litre,m2,m3 Quelle est la relation entre les m3 et les litres 1 m3 = 1000 litres = 1000 kg? Claude Tardif lui répond. |
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A times table in base 5 |
2020-03-11 |
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Felix pose la question : Design a time table for numbers 1-10 in base 5 Penny Nom lui répond. |
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Covering a ceiling with tablecloths |
2017-02-24 |
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DEANNA pose la question : I am trying to cover a 16 x 31 foot ceiling with tablecloths. For sale, are 90 x 132 inch tablecloths for $4.97 a piece and 60 x 102 inch tablecloths for $3.85 a piece. Which would be my cheapest option to cover the entire space? Penny Nom lui répond. |
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A puzzle embedded in a table top |
2016-05-13 |
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Aaron pose la question : I want to make a table with a puzzle embedded in it. The table top would be a
36" circle and the puzzle is 20"x27" I'm thinking that it's not going to fit,
but not sure. Any help would be appreciated.
Thanks,
Aaron Penny Nom lui répond. |
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Countable and uncountable sets? |
2016-01-15 |
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wilson pose la question : what are the countable and uncountable sets? Penny Nom lui répond. |
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An input/output table |
2015-01-13 |
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Rose pose la question : How do you create an input/output table when the rule is: the output is a +5? Harley Weston lui répond. |
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An input output table |
2014-04-19 |
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Stephanie pose la question : I have an input output table with x/y filled out except one x and one y. I need help. How do I find X? Penny Nom lui répond. |
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A table of values |
2014-03-27 |
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Marisol pose la question : A table value X 0,1,2,3,4,5,6 and Y 3,7,11,15,19,23,27 . what relationship of X to Y is represent by which equation? A . y= 4x. B y =x+3 . C y =4x+3 or . D y =4x-3 Penny Nom lui répond. |
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Matrices |
2013-11-10 |
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Ricky pose la question : Why must we have brackets around matrices. Why don't we just neatly write an array of entries cross-wise and up and down to indicate a particular matrix? Chris Fisher lui répond. |
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A chart for y=mx+b |
2013-03-11 |
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jacinda pose la question : how to make a chart for y=mx+b Penny Nom lui répond. |
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The multiplication table for the different bases |
2013-02-01 |
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sylvia pose la question : I am having a difficult time trying to figure out how to fill in the multiplication table for the different bases. i don't know how to get the numbers. Penny Nom lui répond. |
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An input-output table |
2010-06-07 |
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Brian pose la question : Make an Input -output table to represent the function. Use 0,1,2,3 as the Domain.
f(x)= 3+7x Harley Weston lui répond. |
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A table of values |
2010-04-22 |
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Donna pose la question : Complete the table by determining the value of each letter. Explain what rule is used to relate the numbers in the second column (with the heading of y) with those in the first column (with the heading of x).
x | y
3 | 5
9 | 23
4 | 8
6 | A
7 | B
C | 11
D | 2
I can't figure this out, can you help me? Robert Dawson lui répond. |
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y=2x+1 and y=2x-1 |
2009-08-28 |
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MARICELA pose la question : Need help of how to work this problems
y=2x+1 and y=2x-1
First of all what is the difference?
Second I think is easy just to work with the X y with the line in the middle
but how do you get the numbers for each side. Penny Nom lui répond. |
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The axiom of choice and constructibe sets |
2009-04-10 |
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sydney pose la question : The axiom of choice asserts the existence of certain sets, but does not construct the set. What does "construct" mean here? For example, does it require showing the existence and uniqueness of some function yielding the set? In general, what does it mean to require the existence of a mathematical object be tied to a construction of it? Claude Tardif lui répond. |
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A slopped table top |
2009-03-16 |
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anthony pose la question : A perfect circle with radius 100m is supported by four legs, 50m long. The circle is flat when all four legs are 50m long, and tilted when the legs are different in length. The four legs are spread evenly 90 degrees apart at 0, 90, 180, and 270. Find the high and low points in degree and height when the legs are 55m at 0 degree, 70m at 90 degree, 45m at 180 degree, and 30m at 270 degree.
Not sure if they can be calculated using only 2 or 3 legs.
I have tried by picking the two adjacent highest legs (55m and 70m) so I know the high point falls into the first quadrant. Then I tried using ratio to determine where the high point is, which I think high point should be closer to the 70m leg, I am not sure. If I can find the high point, the low point should be opposite to it. Chris Fisher and Harley Weston lui répond. |
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An octagonal poker table |
2009-02-23 |
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Corey pose la question : I'd like to build an octagonal poker table using 4'x8' sheets of plywood. I would like each side edge to be approx. 2' wide. I am sure that due to the angles I can do this with one sheet of plywood, but i don't know how to measure for this. Can you help? Robert Dawson and Harley Weston lui répond. |
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Seating around a circular table |
2009-02-09 |
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Jenny pose la question : A committee of 15 -- 9 women and 6 men -- is to be seated at a circular table (with 15 seats). In how many ways can the seats be assigned so that no two men are seated next to each other? Victoria West lui répond. |
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The circumference of a table |
2009-01-14 |
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Maggie pose la question : My dinning room table is 48 inches. I need to know what its Circumference is?
I do not know algebra so a formula will not help me. Penny Nom lui répond. |
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The table of values for y=3x-10 |
2009-01-09 |
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Jade pose la question : How can I know the value of x for y=3x-10 in this table of values pls. include the deatails
if x=-2 y=-16
if x=3 y=-1
but how if y=2 what is x Penny Nom lui répond. |
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Compatible numbers |
2008-10-30 |
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Paul pose la question : Use compatible numbers to estimate the quotient of 23.52 and 11.04 Penny Nom lui répond. |
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Escort cards on a rectangular table |
2008-06-13 |
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Susan pose la question : What size rectangular table will we need to put 230- 2" X 3.5" escort cards on for my daughter's wedding reception with a spacing of .5 inch between them on all sides? Thanks so much for your help Penny Nom lui répond. |
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Rectangular cards on a round table |
2008-06-11 |
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Susan pose la question : How many 4" X 3.5" wide escort cards will fit on a 48" diameter table. These are for my daughters wedding. I have already added the extra spacing between the cards into the size of the cards.Thanks for your help Janice Cotcher and Harley Weston lui répond. |
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Saving to buy a coat |
2008-03-09 |
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alayna pose la question : Jackie is saving her money to buy a coat that costs $121. If she already has $61 and saves
$15 each week, in how many weeks can she buy the coat ? Make a function table to answer the
question. Penny Nom lui répond. |
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Cantor's diagonal argument |
2008-01-26 |
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David pose la question : Cantor's theory using a diagonal across a list of real numbers to proven uncoutability has always puzzled me.First in base ten, it feels like hocus pocus so I began thinking of the Boolean numbers as truer representations of place value (on,off). Secondly his list was always arbitrary or so I recollect. Therefore, I suggested using a seriesA=.10000....,B=.01000. C=.11000, etc.
Any diagonal is already located among the numbers listed. My only alteration is that since the final digit is always unrepresentably either one or zero, but it must be one or the other, I make an assumption that if x= .abc...1 and y= .abc...2 the only two possibilities and I choose to count F=x+y then then the numbers are countable= Z=sumFi,where I=2+2^2+2^3...
I hope this sketch is enough description, I asked Rudy Rucker more formally but got no mathematical response, someone else gave me some tale about slippery epsilon. What do tyou think of recasting his proofs in more rigorous form?
David French Claude Tardif and Walter Whiteley lui répond. |
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A circular table is pushed into the corner |
2007-10-31 |
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Will pose la question : A circular table is pushed into the corner of a square room so that one point is 8 inches from one wall and 9 inches from the other. What is the radius of the table? Penny Nom lui répond. |
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An octagonal table |
2007-10-18 |
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Lorne pose la question : I am 77 years old and want to build a table top with each side measuring 23 inches.
I believe the diameter would be 55.5 inches. Is this correct and what is the angle of the cuts I have to make? Thank you for your patience. Penny Nom lui répond. |
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More on the cardinality of sets |
2007-07-27 |
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Mac pose la question : Can you please help me to find and verify whether the following are
finite, countably infinite and uncountable ? Harley Weston lui répond. |
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Countable and uncountable sets |
2007-07-24 |
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Mac pose la question : Hi, i tried to read few webpages related to the countably infinite and uncountable sets.
Even i read few questions from this forum.
But i am not convinced with this explanation. If you have any good book that
explains this in layman term, please redirect me to that.
1) Can you please explain what is the difference between these too ?
2) How could you say set of Natural number and set of even numbers are countably
infinite ?
N={1,2,3,...} and Even= {2,4,6,...}
When an element in the even set is some 2n, we will map it to 'n'.So
now we have a bigger number(2n) right ?
Sorry, i didn't understand that.
...
Can you please help me out to understand that ? Harley Weston lui répond. |
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Countable and uncountable sets |
2007-02-13 |
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piyush pose la question : we se that union of countably infinite no of sets having countably infinite number of elements is a countable set we can express p(n) (i.e power set of natural number) as a union of countable infinite number of sets i.e p(n)=s1Us2Us3..... where s1=null s2={1,2,3,4,5..........} s3={{1,1},{1,2},{1,3},..............{2,1},{2,2}........} using the same statement can we prove that power set of natural number is a infinit countable set Penny Nom and Claude Tardif lui répond. |
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Input-output table |
2007-01-10 |
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Richard pose la question : Question is make an input - output table for the function using the domain 0,1,2,3,4, Then state the range of the function.
y =x + 8 ?
y =0.4x +3 ? Penny Nom lui répond. |
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The real numbers with decimal representations consisting of all 1s. |
2006-10-29 |
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Ivessa pose la question : Determine if the following set is countable or uncountable : the real numbers with decimal representations consisting of all 1s. Steve La Rocque and Walter Whiteley lui répond. |
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Mastering the multiplication tables |
2006-04-04 |
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Ellie pose la question : I need a detailed study plan fro helping my son master his multiplication tables.
Grade: 3 elementary Paul Betts lui répond. |
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A table of values |
2006-03-28 |
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Cindy pose la question : Create a table of values for each of the following functions: y=5x, y=52, and y=5x. I dont know to do this. Stephen La Rocque lui répond. |
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The cartesian product of a countably infinite collection of countably infinite sets |
2006-03-25 |
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Geetha pose la question : Is the cartesian product of a countably infinite collection of countably infinite sets countable infinite? Penny Nom lui répond. |
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What percentage of the seniors polled yes? |
2006-03-20 |
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Jean pose la question : An equal number of juniors and seniors responded to the question, "Do you like math?" Each respondent said yes or no. If 70% of those who said yes were seniors and 80% of those who said no were juniors, what percentage of the seniors polled yes? Penny Nom lui répond. |
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How long and how wide is the table? |
2006-02-02 |
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A student pose la question : the perimeter of a table is 24 feet. the table is twice as long as it is wide. how long and how wide is the table? Penny Nom lui répond. |
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Complete the array |
2005-12-11 |
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Ginger pose la question :
Make the sum of these number add up to six.
Going across, down, corner to corner. Using the number 4, 2, 0 only.
Penny Nom lui répond. |
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Quadratics |
2005-01-05 |
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Usman pose la question : Hi, in my Grade 11 Functions math class we have been assigned the task of finding jobs and careers related to quadratics, I have done many searches but have been unsuccessful, then I saw your website and e-mailed. I also have to use an example of a math problem that the job uses, then solve it, this will all compile on bristol board for a presentation. I would greatly appreciate it if you could send me some links and references of sources that refer to this subject. Harley Weston lui répond. |
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An elliptical table |
2005-01-03 |
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Roger pose la question : Want to make an elliptical table, say the long (major) axis is 4 feet, and the short (minor) axis is 3 feet. I can construct this figure, but I'm trying to figure out what the exact dimension of a rectangle within this ellipse will be if I make the table a drop leaf type where the drop dimensions are equal for each end of both the long and short axes. Intuitively, it looks like there is one and only one solution. Penny Nom lui répond. |
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Chi-Squared |
2004-05-05 |
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Gillian pose la question : OF75 PEOPLE, 43 ARE EXPOSED TO A VIRUS AND BECOME ILL. 11 PEOPLE ARE EXPOSED AND DO NOT BECOME ILL. 3 PEOPLE ARE NOT EXPOSED AND BECOME ILL. 18 PEOPLE ARE NOT EXPOSED AND DO NOT BECOME ILL. THE ATTACK RATE IS 80% FOR THOSE EXPOSED AND 14% FOR THOSE NOT EXPOSED. THE RELATIVE RISK IS 5.7. CAN YOU EXPLAIN TO ME HOW TO CALCULATE A CHI SQUARE TEST FROM THIS. Penny Nom lui répond. |
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Arrangements around a circular table |
2003-10-07 |
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Lori pose la question : How many arrangements can 6 people be seated round a circular table? Penny Nom lui répond. |
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The base 10 multipliction table |
2002-07-07 |
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A student pose la question : These are two questions from Math for Elementary Teachers and they have me stumped. You have two coins that are worth 30 cents. One of the coins is not a nickel. What are the two coins? The product of the diagonals of any 2x2 matrix in the base 10 multiplication table are equal. Why? Penny Nom lui répond. |
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Cardinality of sets |
2001-11-19 |
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Tania pose la question :
- Show that the cardinality of P(X) (the power set of X) is equal to the cardinality of the set of all functions from X into {0,1}.
- Show that (the cardinality of the natural numbers set) |N| = |NxNxN|.
- Show that the cardinality of the set of prime numbers is the same as the cardinality of N+
Walter Whiteley lui répond. |
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Subsets of a countably infinite set |
2001-11-14 |
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Tania pose la question : How could I show (and explain to my son) that any countably infinite set has uncontably many infinite subsets of which any two have only a finite number of elements in common? Claude Tardif lui répond. |
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Logic and Matrix Instruction |
1998-04-24 |
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Robin Booker pose la question : I need assistance with instruction strategies to teach the construction of a matrix, solving a logic problem. Providing instruction in the construction of a simple matrix , no problem. However, I stumpted on this one. Five players were chosen as All Stars at the basketball banquet. Based on the following clues, find the player's name, team, uniform color and number of points scored.... Harley Weston lui répond. |
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