Welcome to the forum.

You haven't given us any background to explain what these questions are about. The title is polygons, so I thought this might be the numbers of sides (N) and either the total angle sum, the exterior angle or interior angle if the polygon is regular. But I cannot make any of the answer choices fit with any of those possibilities, so I'm stuck with how to help. Please give the whole question and a diagram if possible. If you cannot show a diagram then describe in words.

Thanks,

Bob

]]>I think it is true. But say more about what led up to the question.

What is the mathematical topic ?

Do you have a definition for an 'expression' ?

Does aa mean 'a AND a' ?

Does a + b mean 'a OR b ?

Does a* mean 'NOT a' ?

Bob

]]>Your example shows why no theoretical formula is possible. For example, if someone hadn't told you about a job, you'd never have applied. Some company bosses may have a preference for employing persons related to existing good workers because they think they'll get another good worker. Or a boss may be prejudiced against doing that because it was a mistake in an earlier appointment. Unless you know everything about everyone, you couldn't assess the probabilities and even if you had a super database capable of storing all the relevant information, it would be out of date by the time you got in all the data.

Best chance would be to try for an experimental result. ie. You collect lots of actual employment records and assess the probability from that. I don't think it would lead to consistent results if you repeated the collection with new (random) data.

Bob

]]>Once you are logged in, click for the index and then a subsection, most likely Help Me. There's a link for **post new topic** on the top right hand side.

Bob

]]>This is a linear equation involving *b* only and so should be solvable for all values of *b*. The cubic function itself should also have inflection points for all values of the constant *c* since this only determines the height of the curve relative to the *x*-axis, not its shape.

This request for help has been posted 7 times by you. I consider this to be abuse of the forum. You have been shown how to add proper images and I have given a detailed answer to the shuffleboard question. The dartboard question cannot be answered because you have never provided a diagram and without this the answer could be anything. Please do not keep doing this or I shall have no choice but to delete your account. Please look at this post:

http://www.mathisfunforum.com/viewtopic … 20#p401220

and respond there. Either what I have said is helpful in which case you need to answer each of my questions so I can check your work or you need to ask something new relating to what I have said. Do not use postimg for your images. If you fail to do as I ask then your account will be removed.

Bob

]]>This request for help has been posted 7 times by you. I consider this to be abuse of the forum. You have been shown how to add proper images and I have given a detailed answer to the shuffleboard question. The dartboard question cannot be answered because you have never provided a diagram and without this the answer could be anything. Please do not keep doing this or I shall have no choice but to delete your account. Please look at this post:

http://www.mathisfunforum.com/viewtopic … 20#p401220

and respond there. Either what I have said is helpful in which case you need to answer each of my questions so I can check your work or you need to ask something new relating to what I have said. Do not use postimg for your images. If you fail to do as I ask then your account will be removed.

Bob

]]>Anyway, I see you what you mean. I don’t think it’s possible. With more people than tables, a rotation will mean that at least two people sitting at one table will have to sit at the same table and see each other again.

]]>12! = 479001600 ≡ 736 (mod 2012),

20! = 2432902008176640000 ≡ 344 (mod 2012);

20!×12! ≡ 344×736 = 253184 ≡ 1684 (mod 2012).

]]>I have a homework that i am really stuck with!

Does anyone know what all of the common multiples of 9, 10, 11 and 12 please??

The common multiples of 9, 10, 11, 12 are the multiples of their lcm (lowest common multiple).

To work out their lcm, first note that 9, 10, 11 are coprime so their lcm is simply their product: lcm(9,10,11) = 9 × 10 × 11 = 990.

Now we work out the lcm of 990 and 12. This is equal to their product divided by their gcd (greatest common divisor). We have gcd(990,12) = 6. Hence lcm(990,12) = (990×12)/6 = 1980.

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