Science & Mathematics - 29 December 2007

5y+2 2x-4
------ + -------
xy^2 4xy


adding and subtracting rational expressions...i dont get any of this rational expresion crap...its so hard...i want to punch myself


im only in 10th grade

2007-12-29 09:45:35 · 11 answers · asked by Anonymous in Mathematics

I have a Jason Explorer Model 307 telescope but I do not have a manual and it is missing the eyepieces and lenses that came with it. I have tried Bushnell but have not gotten very far. Does anyone know where I can get the manual and a set of the eyepieces?

2007-12-29 09:40:16 · 2 answers · asked by Anonymous in Astronomy & Space

2007-12-29 09:39:05 · 12 answers · asked by Hoot 3 in Astronomy & Space

continental crust or oceanic crust. Why?

2007-12-29 09:30:59 · 15 answers · asked by Cactus Jack 4 in Geography

2007-12-29 09:22:45 · 3 answers · asked by drainbamaged303 1 in Mathematics

Colour is caused by the reflection of light, inside a blob of custard there is no light. Is it therefore black inside the blob?

2007-12-29 09:18:58 · 8 answers · asked by Me 5 in Physics

I can't decide. Is the O2 a peroxide?

2007-12-29 09:10:09 · 2 answers · asked by Anonymous in Chemistry

what is phenadoze

2007-12-29 09:10:06 · 2 answers · asked by scorpion 1 in Astronomy & Space

How many cups equal 122 Grams

2007-12-29 09:08:35 · 8 answers · asked by conblond2000 1 in Mathematics

2007-12-29 09:03:00 · 4 answers · asked by ? 4 in Mathematics

Please give me a brief explanation of how you got these answers so I'll be better at in the future. Thanks. :)

1.) Which doesn't represent a possible intersection of a line and a right cone with height 4 cm: 3 points, 2 points, or one point?

2.) Describe the locus of all points in a plane that are 9 cm from M?
circle M with a radius of 18 cm
circle M with a radius of 9 cm
square with 9 cm sides
square with 18 cm sides

3.) Describe the locus of all points that are 3 cm from a point m?

a line, 3 cm from line m
a pair of parallel lines, each parallel to and 3 cm from line m
a sphere with a radius of 3 cm
a circle with a diameter of 6 cm

I really don't get that locus stuff, if someone could explain I'd feel smarter lol. :)

2007-12-29 09:01:06 · 3 answers · asked by BetterCallJesus! 1 in Mathematics

2007-12-29 08:59:01 · 4 answers · asked by Anonymous in Mathematics

my did took 2 years of it and he said he hasnt used it since he makes great money over $80,000 a year has a welder,/steel worker

2007-12-29 08:57:36 · 9 answers · asked by kelly S 2 in Mathematics

2007-12-29 08:49:54 · 11 answers · asked by raymond c 1 in Mathematics

2007-12-29 08:48:51 · 3 answers · asked by Anonymous in Geography

2007-12-29 08:47:53 · 4 answers · asked by ʞzɹәႨnɹ 2 in Mathematics

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

2007-12-29 08:42:45 · 5 answers · asked by Anonymous in Mathematics

The atmospheric pressure p on a balloon or an aircraft decreases with increasing height. This pressure, measured in millimeters of mercury, is related to the height h (in kilometers) above sea level by the formula p = 760e^(-0.145h).

(a) Find the height of an aircraft if the atmospheric pressure is 340 millimeters in mercury.

(b) Find the height of a mountain if the atmospheric pressure is 777 millimeters in mercury.

2007-12-29 08:34:32 · 5 answers · asked by journey 1 in Mathematics

Whats a good electrical conductor and why?

2007-12-29 08:31:15 · 3 answers · asked by MentoKings10 2 in Other - Science

I'm taking Astronomy right now, but my teacher's doing an awful job at teaching it. I'm doing a project on Antimatter, but I'm having trouble understanding some of these concepts. From my research, I know what CP-transformation/operation is, and that CP-Violation explains the Matter/Antimatter Asymmetry, but why does it happen? (And how?)

2007-12-29 08:28:37 · 3 answers · asked by Rain Fall 2 in Astronomy & Space

My brother has a science fair project, and Im helping him with it. I just need to know at what degrees does coke freeze?

2007-12-29 08:19:56 · 4 answers · asked by unaversallafter 1 in Chemistry

...is an OD? im not suicidal or anything, it's just something i was talking to someone about, they said you can't OD on paracetemols unless you take like 48. is that true?

2007-12-29 08:19:34 · 8 answers · asked by Anonymous in Medicine

Solve each log equation.

(1) log_6 (36) = 5x + 3

(2) e^(-2x) = 1/3

2007-12-29 08:17:52 · 5 answers · asked by journey 1 in Mathematics

Simplify: (1/2) (2x - 10) =

A. 2x + 5/2
B. x + 5
C. x - 20
D. x - 5

Name the property that is illustrated: a + (-a) = 0

A. Identity
B. Additive Inverse
C. Reflexive
D. Multiplicative Inverse

Solve: 2a + 1 = 2a - 5

A. a = 7
B. no solution
C. a = 1
D. a = -19/2

Simplify: 1/3(6a - 3)

A. 2a - 1
B. 2a - 19
C. 18a -1
D. 3a + 1

What letter represents the y-intercept in the slope-intercept equation?

A. x
B. y
C. m
D. b

2007-12-29 08:15:16 · 3 answers · asked by Donny 2 in Mathematics

Solve each log equation.

(1) Ine^(-2x) = 8

(2) log_5 (626) = x

2007-12-29 08:13:50 · 4 answers · asked by journey 1 in Mathematics

Solve each log equation below.

(1) log_5 (x) = 3

(2) log_3 (3x - 2) = 2

2007-12-29 08:11:47 · 6 answers · asked by journey 1 in Mathematics

How to find the radius of a circle with radius 10 Cm.



I Drew a circle with center O at P(0,0).
Let dr = a small change in radius.
Define Pi = A/(2R) => A = 2PiR

Integrate from R = 0 to R = R
the curve 2Pi ⌠Rdr
= PiR^2 = Area of the circle


So I know the radius is 10 cm...then the area = Pi*100 = 314 cm^2

That seems a bit complex ...I'm just looking for a simple formula for the radius...


I know that if I take an angle of Pi/4 * R = Arc Length of this segment ....so then I tried splitting the area up into 4 pieces

314 /4 = Pi*R

I'm trying to find R ...but I am stuck

Help????

2007-12-29 08:09:18 · 3 answers · asked by Anonymous in Mathematics

I stoped beliving in the Big Bang theory and started beliving in Steady State pretty recently. How many of you reject the Big Bang and belive in Steady State?

2007-12-29 08:08:44 · 7 answers · asked by ? 3 in Astronomy & Space

2007-12-29 08:04:15 · 4 answers · asked by AdventGrEd 2 in Other - Science

The coordinates of the midpoint of a segment with the endpoints A( 0, 2, 4) and B (-8, 2, -6)?

Please tell me HOW you got he answer also. Thanks :)

2007-12-29 08:03:08 · 3 answers · asked by BetterCallJesus! 1 in Mathematics