Mathematics - 7 November 2007

Find 3 numbers in which the 1st is the sum of the 2nd and the 3rd, the 2nd is the square root of the 3rd and the sum of these 3 numbers is a minimum

2007-11-07 08:15:43 · 6 answers · asked by Chrisso 2

Which of these is used to represent a probability of an event, n?

A) n(p)
B) pn
C) p(n)
D) p!n

an explanation of why you think your answer is right would be greatly appreciated! <3

2007-11-07 08:03:31 · 2 answers · asked by teanah203 4

2007-11-07 07:58:20 · 14 answers · asked by Aurelia 3

Compute the following integral

∫ e^(-x-y) with respect to y from 0 to infinity.

2007-11-07 07:54:51 · 1 answers · asked by cornzxo1 1

show step by step how to find the limit using L' hopitals rule limit x-->0 (x2^x)/ (2^x-1)

P.S I have done my homework but this question for test review and I am getting wrong answer even when i used LN to find the answer.
Thank you for your help.

2007-11-07 07:50:22 · 2 answers · asked by Devils advocate 1

If I got 117 out of 150, and the median is 124 and the mean is 122.1 and the standard deviation is 13. What is the diff between the median and mean? What is my letter grade probably be?

2007-11-07 07:47:07 · 4 answers · asked by naingzaw 2

9y + 5 = 2y + 3 with working out really easy one (but not for me)

2007-11-07 07:36:45 · 13 answers · asked by Anonymous

If you could show work it would be awesome, I can't remember how to do these...

Mandy invests $800. She invests part of it a fund that pays 9% per annum and the rest in a fund that pays 5% per annum. After one year, she had earned $54 interest. How much did she invest in each fund?

2007-11-07 07:34:42 · 6 answers · asked by Anonymous

Can you find two 3-digit numbers that add to a third 3-digit number, such that all the digits from 1 through 9 are used exactly once?

I don't have an answer. The puzzle occurred to me as I was answering Mandy's question http://answers.yahoo.com/question/?qid=20071107115447AAkD2Ah

2007-11-07 07:25:56 · 7 answers · asked by DWRead 7

2007-11-07 07:24:10 · 3 answers · asked by osnap 1

1. Use the remainder theorem and find the remainder when P(x)=x^4-5x^3+4x-4 is divided by x+2?
2.Determine the values of K for which 3x^@+KX+12=0 has exactly one solution?
3. Write a quadratic function with -3+5i and -3-5 as the solutions.
4. SOlve x^2+2x+3>11.Graph the solution set on a number line.

2007-11-07 07:23:41 · 1 answers · asked by +++cHaRmZ+++ 1

i'm not good at word problems and i could use some help!!
for certain problems i can't figure out what to write as the equation... i know how to solve the equation but i don't know what to wrte for it:

a passenger train leaves south station 2 hours after a freight train leave the same station. the freight train is treveling 20 mph slower than the passenger train. find the rate of each train if the passenger train catches up with the freight train in 3 hours.

equation??

2007-11-07 07:15:12 · 4 answers · asked by Anonymous

2007-11-07 07:14:27 · 4 answers · asked by sara a 3

2007-11-07 07:14:07 · 3 answers · asked by Anonymous

2007-11-07 07:12:58 · 1 answers · asked by Elias D 1

2007-11-07 07:07:33 · 8 answers · asked by Anonymous

x 1 2 3 4
------------------------------------------------------
P(X=x) 0.2 0.3 0.4 0.1

Calculate P(1
Please show me HOW do do this i am stumped!

2007-11-07 07:04:24 · 3 answers · asked by My pic looks good 2

lim ((ln 2 + h) - ln 2)/h
h->0

How do we find the limit?

2007-11-07 07:03:03 · 4 answers · asked by LingLing 1

2007-11-07 06:54:47 · 4 answers · asked by Mandy S 1

I am try to find the cartesian product of 5 small sets, if one of these sets is the empty set, does this make the cartesian product the empty set too?

2007-11-07 06:48:12 · 1 answers · asked by Anonymous

who ever explains it the best....gets the full points

2007-11-07 06:45:16 · 2 answers · asked by Chrisso 2

Suppose X and Y have joint density f(x,y) = e^(-x-y) for x,y > 0.

What are the marginal distributions of X and Y?

2007-11-07 06:45:11 · 1 answers · asked by cornzxo1 1

2007-11-07 06:44:36 · 1 answers · asked by David M 1

Please help, I have been giving some math homework to do on Elimination Method in Simultaneous Equations.
Some of the equations are:
3x - 2y=7 and 4x - 4y=8
-2x - 5y= -6 and 3x + 4y=2

How do you work them out, thanks so much =)

2007-11-07 06:40:09 · 3 answers · asked by percysmate 2

My teacher said he'll give an A to the student that comes up with a question that has nothing to do with chemistry. So I decided to go with "Is 1103 a prime number?" I need feedback on whether this is a suitable one or not. I really need an A please help =)

2007-11-07 06:39:24 · 11 answers · asked by ? 2

2007-11-07 06:39:17 · 2 answers · asked by Anonymous

What is the smallest set that is both 'CLOSED' and for which all of its elements have an 'INVERSE' ?!

God Bless the person who can give me the answer !

2007-11-07 06:35:12 · 1 answers · asked by rOcKsT*R 2

Find the solution to the differential equation, subject to the given initial condition.

1) dy/dt= y/4+t, y(0)=4
y(t)=?

2) (dy/dx)+(y/9)= 0, y(0)=10
y(x)=?

2007-11-07 06:32:08 · 1 answers · asked by Victor 1

im 14 years old and im finding it really difficult to do simple subtraction,division well everything to do with maths except algebra and multiplication. i get really upset and frustrated. it was only recently i found out how to do multiplication. i no some of you may be thinking that im stupid or something for not knowing these simple things at 14 but i dont no why i find it difficult i struggle alot in maths when im at school or at home (when doing courework) what is even really upsetting is that my predicted grades for GCSE in maths is F my parents are really upset with me because of my predicted grade they are always telling me about other children or teenagers they know that have done well at school and i also struggle whenever i go to the shops i cannot figure out the total costs in my head with the things i want to buy.

2007-11-07 06:32:03 · 5 answers · asked by Little Wing 4

A company wishes to design a rectangular box that will have a volume of 1125 cubic inches. The bottom and top of the box is a rectangles with a length which is 3 times the width. What should the dimensions be to minimize the surface area of the box?

2007-11-07 06:21:26 · 3 answers · asked by whoo_kidd1 1