Mathematics - 9 October 2007

2007-10-09 23:38:50 · 9 answers · asked by chittaranjan r 1

2007-10-09 23:36:35 · 8 answers · asked by Jessica Nicole M 1

hi guyz

Can any one help me in this

Find b if the coefficint of x^11 in the expantion (x^2 +1/bx)^10 ????

2007-10-09 22:57:24 · 2 answers · asked by Kelly 1

Let n be a natural number greater than 1, and suppose we have n people boarding a train carriage that has n seats, each passenger having a ticket which designates the seat in which they are supposed to sit. The first person to board sits in a seat randomly chosen. From then on, a passenger sits in their designated seat if it's available, and if not, sits in a seat they choose at random.

What is the probability that the nth person sits in the seat designated by their ticket? To win the points, provide a proof.

2007-10-09 22:33:15 · 3 answers · asked by MHW 5

2007-10-09 22:22:04 · 2 answers · asked by Anonymous

Use the integral test to determine whether the series below converges or diverges. What values does the integral test yield?

1) Infinity(Sigma)n=0 (11)/((n^2)+49)
2) Infinity(Sigma)n=2 (1)/(n)(ln(n))^2
3) Infinity(Sigma)n=2 (3)/(4n-1)^2

Does the series converge or diverge?

2007-10-09 22:11:19 · 1 answers · asked by Victor 1

first the question is.
If chocolate has 6% fat how do you work out how much there is in 0.5 of chcolate in gramms

one way of doing it is (0.5/100)x6=0.03

but how can 6% be calculated as 0.06

so you can do it as 0.06x0.5=0.03

2007-10-09 22:04:40 · 13 answers · asked by Anonymous

I got this letter to send one pair of socks to the name at the top of the list and then write the name of the person who sent it to me on the #1 spot and my name on the #2 spot . So I wasn't adding my name to the bottom of a long list like most chain letters... I talked to one of friends and she said it doesn't work, no matter what. I'm supposed to get 36 pairs of socks for the price of one... Why doesn't it work, if everyone participates?

see example:
http://members.tripod.com/oziahz/sock.htm

2007-10-09 22:03:54 · 5 answers · asked by Anonymous

(n!)^2/(kn)!

i know you use the ratio test but where do you go from there?

2007-10-09 21:29:41 · 2 answers · asked by Anonymous

Thea notices that 4 = 2 + 2, 6 = 3 + 3, 8 = 5 + 3, and 28 = 23 + 5, so she thinks that it is likely that every even number can be written as the sum of two prime numbers.

is this Deductive or Inductive?

2007-10-09 20:43:31 · 3 answers · asked by bollionaire 2

i cant figure it out it's killing me
i tried An = (n-1)(|n|-2)
nothing works :(

2007-10-09 20:41:00 · 2 answers · asked by robbyack2000 2

ok i'm not dumb...but i thought it would be 4 because the negatives cancel out...so i tried it in my graphing calculator and it says it is -4 is that true???

2007-10-09 20:00:03 · 8 answers · asked by Anonymous

What is the period of k(t) = cos(2t/3)? I found the amplitude and phase shift but am not sure how to find the period for this problem.
Also, if 8 is the amplitude, and 2 is the period, and 0 is the phase shift, what is the rule of the periodic function?
Thanks for explaining!

2007-10-09 19:56:54 · 2 answers · asked by Anonymous

A, B, C, D, E, and F are all integers and no two are the same integer.
(a) Find values for A, B, C, D, E, and F so that the linear equations Ax + By = C and
Dx + Ey = F have the same solution (−3,4) .
(b) Sketch a graph to represent your two equations.
(c) Is your set of values for A, B, C, D, E, and F unique? Explain how you know.

2007-10-09 19:43:45 · 2 answers · asked by SuperAwesomePhunThyme 1

I dont know the method to solve this and there is no good web reference that shows me how to step by step solve this. I know what the terms need to look like, but i dont have a really good idea on the method. Can someone please help me, show me or refer me to something that clearly shows the method for working this out. My textbook only dedicates about 2 pages to mclaurin series :(

Best answer gets 10 points immediately

2007-10-09 19:43:31 · 3 answers · asked by cutiemutie9 1

http://answers.yahoo.com/question/index;_ylt=AsG5R_Ta23TqMtPj8FPuxVjsy6IX;_ylv=3?qid=20071009175400AAcJUFa

All you have to do is look at the answer (468) and tell me how you would have figured it out. Like how you used multiplication or whatever (I know thats not in there but whatever) but I don't want any high schoolish answers like 'Yeah take a then convert it to z^' or whatever. Keep it short and simple. Easiest understood answer is the best answer.

2007-10-09 19:40:01 · 6 answers · asked by ŤεĎĎγкέωŦ 2

I figured out the answer for this question through guess and check, but I cannot figure out the equation I need to use to solve the problem.

Bob drove from TownA to TownB, a distance of 250 miles. He increased his speed by 10mi/hr for the 360 mile trip from TownB to TownC. If the total trip took 11 hours, what was his speed from TownA to Town B?

The answer is 50mph, but I cannot figure out how to get this without guess and check. Any help is great. Thanks.

2007-10-09 19:24:44 · 6 answers · asked by Anonymous

a.17/7
b.31/7
c.7/7
d.25/7

2007-10-09 19:22:07 · 12 answers · asked by Monique H 1

can you factor xu out of sqrt[(x^2) + (x^2)(u^2)]

ifyou can then how??

2007-10-09 19:14:01 · 3 answers · asked by garlin104300 1

???????????????????

2007-10-09 19:09:42 · 2 answers · asked by KittyMeowGrrrr 5

The number of typo errors in textbooks follow the Poisson distribution with a mean of 1.5 per 100 pages. A teacher selects 400 pages of the textbook, what is the probability that there are 4 or more typo errors ?

2007-10-09 19:06:02 · 2 answers · asked by Zac 2

I seriously am stuck at this one problem right now. It is:

If f(2) = 3 and f'(2) = 5, find an equation of the tangent line, and the normal line to the graph of y = f(x) at the point where x = 2.

I know that there is an equation to use. I tried it, but I keep getting the wrong answer from the book. Can anyone please help me?

2007-10-09 18:59:26 · 3 answers · asked by bratty808gurl 1

2007-10-09 18:57:11 · 15 answers · asked by Anonymous

does sqrt (a^2 + b^2) = a+b??

2007-10-09 18:50:02 · 4 answers · asked by garlin104300 1

I have to show that lim a_n = +(infinity) [as n->+(infinity)]
where a_1 >0
and:
a_(n+1) = a_n +(a_n)^(1/2) for all n>=1

It seems to me like it should be really easy, but for some reason I'm struggling.

I proved it is continues, strictly positive, and strictly increasing;

I figure the obvious thing to do is show that it is unbounded, and therefore since it is strictly increasing it diverges to +(infinity), but I'm really struggling to prove that it's unbounded.

Any help either proving it's unbounded above, or just divergent in general would be greatly appreciated!

2007-10-09 18:44:33 · 3 answers · asked by greeneggs4spam 3

match the liner correlation coefficient to scatter diagram the scales on the x and y axis are the same for each scater.

A r=0.787 i have to match this to the right scater diagram. the diagrams have no numbers just dots.

2007-10-09 18:41:40 · 1 answers · asked by maxmac97 1

in the year 1201 a woman was 35 years old.
in the year 1206 the same woman was 30 years old.

how is this possible??????

write 2 or more reason how is it possible?/

2007-10-09 18:22:55 · 4 answers · asked by MiCkY 3

2 across and two down if you add these together in would make an answer

How many possibilities are there to get 200 and what are they

2007-10-09 17:58:05 · 3 answers · asked by jatin b 1

If y varies directly as x and y = 14 when x = 7, find x when y is 30.

x = 2
x = 7
x = 15
The answer cannot be determined with the information given.

2007-10-09 17:55:42 · 3 answers · asked by Anonymous

A barrel contains only apples and oranges. There are twice as many apples as oranges. The apples are either red or yellow, and 4 times as many apples are red as are yellow. If one piece of fruit is to be drawn at random from the barrel, what is the probability that the piece drawn will be a yellow apple? Give answer to the nearest tenth.__________% Remember to use just 4 spaces in the answer.

2007-10-09 17:55:25 · 2 answers · asked by Anonymous