Mathematics - 24 October 2007

Equations of Transformation.
x = εηcos Φ, y = εηsin Φ, z = 1/2(η^2 - ε^2).

How do I find the Scale factors h(subscript ε), h(subscript η), h(subscript Φ)?

You can use E's n's, or o's for the Greek symbols..

2007-10-24 08:14:19 · 0 answers · asked by WhoaNonstop 2

Classify the given numbers as real and rational, real and irrational, or complex.
1. (4)1/2 + 2

Simplify the following algebraic expressions
2. (u^8z^7)/ z^-3u^-2
3. (6a^2/7b^3)^-2

2007-10-24 08:08:16 · 3 answers · asked by Snoopy Baby 1

Let β = ∫ ln ( x + α) dx. Find dβ/dα. The integral runs from sin α on the top to cos α on the bottom.

You can use B's and a's in the explaination, I don't care about the Greek stuff :P

2007-10-24 08:07:58 · 2 answers · asked by WhoaNonstop 2

2007-10-24 08:02:40 · 5 answers · asked by smileyD 1

2007-10-24 08:01:44 · 4 answers · asked by Anonymous

If I was charge $84.99 per month on a phone bill that included 1000 min of calling time. Minutes over that was $0.25 per minute. For month the person used 1142 min. What was the charge?

2007-10-24 08:01:28 · 16 answers · asked by Anonymous

3m^2 - 5m + 2

5s^2-17s+6

-6m+13m+28

thankyou!

2007-10-24 07:52:05 · 8 answers · asked by wiccankisses 3

2007-10-24 07:42:46 · 4 answers · asked by Anonymous

5 times the first of 3 consecutive even integers is 14 more than 3 times the second. What is the third consecutive integer?

10
12
14
16
18

2007-10-24 07:33:56 · 4 answers · asked by kyle p 1

Which of the following could you refer to as a reason for a statement in a proof? [multiple choice]?
a. postulate
b. given
c. definition
d. any of these

2007-10-24 07:27:53 · 4 answers · asked by hillio m 1

(7/2p) - (5/8) + 4 = 0

2007-10-24 07:27:23 · 4 answers · asked by DoWHATiDO 3

Base layer is rectangle nxm, and has arbitrary chosen pattern of brick colors.
The bricks in each next layer nxm are chosen so, that
the color of each brick satisfies the following conditons:

1) Each black brick has even number of black neighbours;
2) Each white brick has odd number of black neighbours.

Prove: there will always appear a layer at certain
height, which pattern is similar to the base layer,
but all colors reversed.

That is if base layer is for exmaple
bwbw
bbbb

then sooner or later layer colored as
wbwb
wwww
will appear.

2007-10-24 07:27:11 · 4 answers · asked by Anonymous

For f(x) x^3 (x-1)^2 (x+6)^4, determine:

a. the x- and y- intercepts, if any

b. whether f(x) touches or crosses the x-axis at each intercept

My answer:

a. The intercepts are (0,0), (1,0), (-6,0). How do I find out which one crosses or touches. I need to be able to do this without using a graphical calculator.

Thanks.

2007-10-24 07:19:00 · 2 answers · asked by labelapark 6

Does a 12' x 24' pool contain of water? One end is 6' deep, the other is 3'.

2007-10-24 07:10:27 · 3 answers · asked by Anonymous

[2x+1]=6x-7

2007-10-24 06:57:33 · 2 answers · asked by investing1987 3

If a hexagon has a radius (center to point of angle) of 6, what is the side of the hexagon?

2007-10-24 06:48:25 · 5 answers · asked by Nathan C 1

Suppose you have the following probability mass function for the three random variables A, B, anc C:

P_(A,B,C) of (0,0,1) = 5/36
P_(A,B,C) of (0,0,2) = 1/36
P_(A,B,C) of (0,1,0) = 3/36
P_(A,B,C) of (0,1,4) = 3/36
P_(A,B,C) of (0,2,2) = 1/36
P_(A,B,C) of (0,2,3) = 5/36
P_(A,B,C) of (1,0,3) = 2/36
P_(A,B,C) of (1,0,4) = 4/36
P_(A,B,C) of (1,1,2) = 6/36
P_(A,B,C) of (1,2,0) = 4/36
P_(A,B,C) of (1,2,1) = 2/36

How would one find the expected value of B?

2007-10-24 06:47:05 · 2 answers · asked by cornzxo 1

I know how to do them like this..

1/2 meaning one half
and
4^2 meaning four to the power of two
But I want to know how you do it correctly.
I have seen some people do it on here, and I just would like to know how to do it myself. Thanks.

2007-10-24 06:43:13 · 8 answers · asked by ♥ ღAngelicaღ♥ 2

2007-10-24 06:35:20 · 3 answers · asked by jason c 1

Find the most general antiderivative of the function. (Check your answer by diffferentiation.

2007-10-24 06:27:05 · 3 answers · asked by sammiballer99 1

can u classify each triangle by its angles and by its sides

okay... triangle means: the symbol that looks just like a triangle

triangleWHO, with m

2007-10-24 06:12:53 · 4 answers · asked by Anonymous

The frequency distribution summarizes a sample of time (in mins) between eruptions of a certain geyser. Find the standard deviation of the data. (ONLY ANSWER NEEDED, NO NEED TO SHOW WORKING)
Time Frequency
40-49 10
50-59 41
60-69 23
70-79 6
80-89 104
90-99 15
100-109 1

2007-10-24 06:08:07 · 2 answers · asked by austin 1

2007-10-24 06:06:54 · 6 answers · asked by Anonymous

With the function f(X) = (x)^(1/2), (square root function), what is the instant rate of change when x =0?

2007-10-24 06:01:11 · 7 answers · asked by Ask or Answer 2

I'm stuck on this problem, please help!

s^6 * t^10
------------- * (100 * s^6 * t^6)
4

* = multiplied by

2007-10-24 05:56:24 · 2 answers · asked by Anonymous

algebra is a mathimatical system

2007-10-24 05:42:03 · 6 answers · asked by chutes_44 1

A thin uniform wire has length 30cm is bent to form a framework in the shape of a right angled triangle PQR where PQ=5cm, QR =12cm and RP =13cm.
Find the distance of the center of mass of the framework from:
a)PQ
b)QR
The framework is freely suspended from the point P and hangs in equilimbrim.
c)find the acute angle that PQ makes with the vertical

Couild you please show your working out so that i can understand how you got your answer, thanks

2007-10-24 05:12:56 · 3 answers · asked by Ryujin 3

I usually screw up this type of question so plz check - thx.

sin(x+y) + cos(x-y) =1. What is dy/dx?

sin(x)cos(y) + cos(x)sin(y) + cos(x)cos(y) + sin(x)sin(y) = 1

cos(x)cos(y) - sin(x)sin(y)(dy/dx) - sin(x)sin(y) + cos(x)cos(y)(dy/dx) - sin(x)cos(y) - cos(x)sin(y)(dy/dx) + cos(x)sin(y) + sin(x)cos(y)(dy/dx) = 0

(dy/dx)(cos(x)cos(y) + sin(x)cos(y) - sin(x)sin(y) - cos(x)sin(y)) = sin(x)sin(y) + sin(x)cos(y) - cos(x)cos(y) - cos(x)sin(y)

dy/dx = [sin(x)sin(y) + sin(x)cos(y) - cos(x)cos(y) - cos(x)sin(y)] / [cos(x)cos(y) + sin(x)cos(y) - sin(x)sin(y) - cos(x)sin(y)]

dy/dx = [sin(x-y) - cos(x+y)] / [sin(x-y) + cos (x+y)]

2007-10-24 05:04:30 · 3 answers · asked by ndavos 2

I can understand the standard tape1/16,1/8, even the 32, but confused about the metric is there a simple way to learn

2007-10-24 04:49:13 · 2 answers · asked by tania 1

Square root of (25x^2 + 5x +16) -5x +16

2007-10-24 04:47:28 · 4 answers · asked by Anonymous