Science & Mathematics - 26 November 2007

Solve 2x + 3y = 11 and x - y = -7 using any method. Explain your choice.

2007-11-26 03:38:48 · 6 answers · asked by Lilsleepy59 3 in Mathematics

2007-11-26 03:37:40 · 5 answers · asked by Cristy B 1 in Geography

I am from out of Europe and the western countries. I live in Iraq and some people I know told me to ask how can we propose a medical finding to the a serious health center in USA or other countries around because they have made an important discovery and may eventually work. The health center in our country don't believe them but they have tried the medicine on two people and it worked. I am asking how can I connect or contact a serious health or medical center in any region of USA or a known and high-ranked university which does medical researches so that they may be interested in this new discovery. It's something about AIDS... Thank you all.

2007-11-26 03:36:16 · 6 answers · asked by Anonymous in Medicine

2007-11-26 03:36:08 · 3 answers · asked by Anonymous in Astronomy & Space

1- What length (in m) of the horizontal runway does it travel over in 7.62 seconds?
2- How many seconds are required for the airplane to gain 1.00 km of altitude?

2007-11-26 03:35:28 · 4 answers · asked by Princess of Death 1 in Physics

Thanks!

2007-11-26 03:34:24 · 8 answers · asked by Anonymous in Mathematics

Like in a circle ......lol

2007-11-26 03:31:01 · 10 answers · asked by janjaley 2 in Astronomy & Space

2007-11-26 03:30:28 · 9 answers · asked by azam_ruwaida 1 in Earth Sciences & Geology

If dice are tossed 10,000 times, and all 10,000 outcomes are multiplied, what is probability that the first digit (that is most significant digit) of the product is 5?

2007-11-26 03:27:54 · 2 answers · asked by Alexander 6 in Mathematics

2007-11-26 03:24:15 · 1 answers · asked by Binson 1 in Physics

If earth rotates from west to east, is it clockwise or anticlockwise?

When opening a tap is it clockwise or anticlockwise?

2007-11-26 03:19:28 · 4 answers · asked by Nimal T 1 in Physics

2007-11-26 03:18:24 · 17 answers · asked by Anonymous in Geography

How many seconds will it take the swimmer to get to the end of the pool, 40.2 m away?

2007-11-26 03:13:40 · 1 answers · asked by Princess of Death 1 in Physics

from the sale of x items.

2007-11-26 03:11:42 · 2 answers · asked by Boogie 2 in Mathematics

things like cremation, coffen, no coffen, leave for animals to eat, ect. the circumstances of death should effect it but what about this stuff?

2007-11-26 03:10:55 · 15 answers · asked by the1infamousme 2 in Parapsychology

If a closed cylindrical can is optimally designed (with respect to surface area used to hold a specified volume) can you determine how the diameter of the base is related to the height of the can?(please say as mush as you can and draw relevant pictures if you cant solve it) thaaanks youuu guyys!!

2007-11-26 03:10:39 · 4 answers · asked by blacksmith 3 in Mathematics

2007-11-26 03:10:35 · 4 answers · asked by ~FairyDust~ 2 in Earth Sciences & Geology

A) resonance
B) oscillating in a standing wave pattern
C) exhibiting sympathetic vibrations
D) All of the above
E) None of the above

2007-11-26 03:09:26 · 2 answers · asked by Monkjitsu 1 in Physics

1-What's the airplane's speed relative to the ground?
2-How many degrees west of north is the airplane relative to the ground?

2007-11-26 03:06:52 · 3 answers · asked by Princess of Death 1 in Physics

I was given the assignment to invent something that hasn't been made before. It can't improve an already made invention, and i have to be able to build a prototype. My invention can't exist in any form. Any ideas?

2007-11-26 03:06:07 · 3 answers · asked by motorradfahren250f 1 in Physics

Just moved to Boise Idaho, and in the garage, my husband found a black widow (young one) We are guessing there are more out there. What's the best way to find and kill them.

2007-11-26 03:00:44 · 6 answers · asked by Bradygirl 5 in Zoology

5x^2+30+40

4x^5+32x^2

45Y^2-6y-3

X^3-25X

2007-11-26 03:00:32 · 1 answers · asked by beartrap4151 1 in Mathematics

the car was travelling 57 km/h(South).What was the change in the car's speed (in km/h)?

2007-11-26 02:53:49 · 2 answers · asked by Princess of Death 1 in Physics

A carnival clown rides a motorcycle down a ramp and around a vertical loop. IF theloop has a radius of 18m, what is the slowest speed the rider can have at the top of the loop to avoid falling?

2007-11-26 02:52:12 · 3 answers · asked by Anonymous in Physics

Use an example as support

2007-11-26 02:50:29 · 2 answers · asked by pimpsharday 1 in Geography

2007-11-26 02:49:45 · 3 answers · asked by shie 1 in Mathematics

2007-11-26 02:43:53 · 2 answers · asked by Anonymous in Physics

2007-11-26 02:38:54 · 12 answers · asked by foxfoxcar 1 in Astronomy & Space

I need a step by step guide on ionic equations (have have no idea how the charges change)- e.g.
CaCo3 + HNO3 ---> Ca(NO3)2 + CO2 + H2O

2007-11-26 02:29:42 · 2 answers · asked by Anonymous in Chemistry

you don't have to help me on the 2 questions, just one im happy enough, the thing is i do not understand vectors much, so theres no point of getting answers without understanding, but if you can do at least one question, with your knowledge i would be grateful :) thanks!!



1.
Prove that the line x = 1 + 2t, y = -1 + 3t, z = 2 + 4t is parallel to the plane x - 2y + z = 6. What is the distance between the line and the plane?

2.

Let A, B and C be three non-parallel vectors in R3. Express A x (B x C)
in the form α*B + β*C with scalars α and β :
(i) Explain why it is clear that A x (B x C) must be a linear combination
of B and C;
(ii) Choose an orthonormal basis ijk adapted to the problem and prove it by
standard properties of the vector product.
(Note: there is a way of choosing the orthonormal basis in a way which makes
all the calculations very easy

2007-11-26 02:27:19 · 3 answers · asked by nack nack 3 in Mathematics