Mathematics - 7 August 2007

Identify each polar equation and test for symmetry.

Let t = theta

(1) r = 1 - 2sin(t)

(2) r = 2 + 4cos(t)

2007-08-07 23:28:40 · 1 answers · asked by journey 1

2007-08-07 23:28:11 · 9 answers · asked by Marie R 1

Identify each polar equation and test for symmetry.

Let t = theta

(1) r^2 = sin2(t)

(2) r = 4 cos3(t)

2007-08-07 23:24:21 · 1 answers · asked by journey 1

subject say 1.
We double it i.e 1x 2 = 2
We multiply it by itself i.e 1 x 1 =1
But if we do nothing to the subject at all i.e
1 x 0 the result is 0 Surely therotically the subject should remain.

This has always baffled me

2007-08-07 22:50:04 · 7 answers · asked by old dick withers 3

find the derivative
f(t)= 3 ln t / ( 2-ln t)
answr: 6 / (t (2 - lnt)^2)

2007-08-07 21:06:58 · 5 answers · asked by biomes 1

find the value of f'(0) when
f(x)= (1/3) e^(3x) + (1/2)e^(-3x)

2007-08-07 20:41:00 · 8 answers · asked by biomes 1

2007-08-07 20:18:01 · 3 answers · asked by Janice C 1

any idea how to solve this? something to do with partial diffentiation. thx

2007-08-07 20:16:04 · 2 answers · asked by Anonymous

If x = 3 and y = -2, then 2x^2 - y - 3 equals:
A 31
B. 17
C. 35
D. 13

I get 35 but it says the answer is 17...what am I doing wrong? I thought two negatives made a positive.

2007-08-07 20:02:02 · 14 answers · asked by Chris 2

11(base 137)=X(base 10)
what is x?

2007-08-07 19:47:30 · 3 answers · asked by Anonymous

degrees more than the measure of he second. find the measure of each angle.

2007-08-07 19:29:21 · 9 answers · asked by natallia m 1

Its been so long I've forgotten how to do this kind of math...
Which of the following is a factor of the equation:
2x^2 + x - 1?
A. (x - 1)
B. (2x - 1)
C. (x + 2)
D. (2x + 1)

2007-08-07 19:28:00 · 3 answers · asked by Chris 2

Here's the question: Suppose you know a kite has an angle of elevation of 52 degrees and you know that is has used up 30 feet of the string attached. Can you find the height of the kite?

2007-08-07 19:08:20 · 10 answers · asked by JojoKoko 1

How many possible combinations of checkers boards are there? 0 to 12 black pieces, 0 to 12 white pieces. Any piece an be kinged. 32 squares.

I'll give 10 points to whomever can give me the lowest number and show how you did it.

2007-08-07 19:02:33 · 1 answers · asked by Michael M 6

When graphing somthing on a number line, when would you use a hollow cirlce and a filled in one? Is it greater than or equal to and less than or equal to are hollow and all the others or filled in?

2007-08-07 19:00:27 · 4 answers · asked by Sean Durkman 2

find the measure of the lenght and the width

2007-08-07 18:58:39 · 7 answers · asked by Carmen P 1

2007-08-07 18:51:03 · 5 answers · asked by Anonymous

2007-08-07 18:46:41 · 8 answers · asked by Carmen P 1

So far I have only done:
z^4-24z^2+169=0
z^4-24z^2= -169
z^4-24z^2= 169 cis Pi

2007-08-07 18:31:55 · 4 answers · asked by cherrichoc 2

a. x = 3
b. x = 4
c. y = 1
d. y = -1

2007-08-07 18:28:25 · 4 answers · asked by Nutella123 1

Two large tanks, each holding 100 L of brine. The tanks are interconnected by pipes
that allows fluid to flow between the tanks. The liquid flows from tank A to tank B
at a rate of 3 L/min, and from tank B to tank A at a rate of 1 L/min. A brine
solution flows into tank A at a rate of 6 L/min with concentration of 0.3 kg/L.
Solution leaves tank A at a rate of 4 L/min and from tank B at 2 L/min. If there was
initially 10 kg of salt in tank A and 20 kg of salt in tank B, find an equation for the
amount of salt in both tanks at time t.

2007-08-07 18:17:53 · 3 answers · asked by Marvin 1

if you cut it short, you're gay.

2007-08-07 18:16:36 · 4 answers · asked by Anonymous

a. (1, 4)
b. (1, 2)
c. (-1, 6)
d. (1, 6)

2007-08-07 18:15:12 · 3 answers · asked by Nutella123 1

2007-08-07 18:09:52 · 6 answers · asked by Rhoddie S 1

Midpoint formula in math

2007-08-07 17:57:49 · 5 answers · asked by Anonymous

how does..

[ln (e - 1 + 1)] / [(e-1) +1] = 1/e ..? what cancels out and how or why..?

also, how do you go from...
[1/t + 1] / [2(ln t + t)^1/2]

to... [1+t] / 2t (ln t + t)^1/2 ..?

2007-08-07 17:42:59 · 2 answers · asked by mma 1

This is a geometrical probability problem

2007-08-07 17:38:15 · 9 answers · asked by Anonymous

[A rectangular storage container with an open top is to have a volume of 10 m3. The length of its base is twice the width. Material for the base costs $10 per sq meter. Material for the sides costs $6 per sq meter. find the cost of materials for the cheapest such container. Note: you need to minimize the total cost, NOT the total amount of material used]

ok..i am a mess.

2007-08-07 17:11:58 · 2 answers · asked by gabjew90 1

Alright. I've been trying to figure this out for years. I'm hoping to gain some insight into this unique number.
Let me set it up.
Take a number, any number (4 digits is good, because so is the number I'm going to be working with, but it works with any).
I'll use 2349 (picked at random).
Now, because the number is positive, we'll subtract. We are going to subtract the digits in opposite order. So:
2349-9432 = -7053
Now that the number is negative, we will ADD the digits in opposite order. We'll continue to do this until we notice a pattern. Bear with me.
-7053 + 3507 = -3546
-3546 + 6453 = 2907
2907 - 7092 = -4185 (etc, let me just give you the answers now that you know the process)
1629, -7632, -5265, 360, 279, -495, 99, 0
That's my point. When this process is used, nearly every number imaginable goes to 0. Try it yourself!

EXCEPT 2178 and it's derivatives:
2178, -6534, -2178(!!), 6534, 2178(!!)

Do you see what I mean? Does that make sense?
Can anyone fill me in on why it's unique?

2007-08-07 17:04:10 · 8 answers · asked by Takkuso 3

Factors and Multiples

1. list all of the factors of 42


2. list five multiples of 42

HELP PLEASE PRETTY PLEASE THANK YOU SOOOOOO MUCH!!!!!!!!!! : )

2007-08-07 16:55:36 · 13 answers · asked by Anonymous