Science & Mathematics - 25 September 2006

2006-09-25 07:48:13 · 7 answers · asked by darlene l 1 in Medicine

Thanks for all your help on simultaneous equation's. Though I am still stuck on how do you know weather to add or subtract a simultaneous equation. Here is a couple of example's. 5x + 7y = 12 3x + 7y = 10 and 33x + 23y = 56 35x -23y =13. There is no need to solve these equation's if you could just give me a good explanation of how I would know weather to add or subtract them.

2006-09-25 07:47:52 · 4 answers · asked by helen y 1 in Mathematics

2006-09-25 07:46:27 · 36 answers · asked by James H 1 in Medicine

You are in a car for a ride, and take the following course:
50 km/h for 2.0 min, turn 90 degrees to the right, 20 km/h for 4.0 min, turn 90 degrees to the right, 20 km/h for 60 seconds (1.0 min), turn 90 degrees to the left, 50 km/h for 60 seconds (1.0 min), turn 90 degrees to the right, 20 km/h for 2.0 min, turn 90 degrees to the left, 50 km/h for 30 seconds (0.5 min).

At this point, how far are you from your starting point? Also, in what direction relative to your initial direction of travel are you?

2006-09-25 07:46:11 · 3 answers · asked by Anonymous in Mathematics

2006-09-25 07:44:18 · 6 answers · asked by Dr M L C 1 in Chemistry

2006-09-25 07:40:48 · 7 answers · asked by C.C. 4 in Engineering

2006-09-25 07:40:30 · 12 answers · asked by kle 1 in Physics

the integral of (sqrt(64-x^2))/x dx

having trouble with it, tried both u sub and parts and any help in cracking this one would be greatly appreciated

2006-09-25 07:40:16 · 3 answers · asked by Anonymous in Mathematics

2006-09-25 07:38:42 · 2 answers · asked by candice 2 in Mathematics

Just trying to see what is the best all around handgun. If you feel there is better please post it.

2006-09-25 07:37:22 · 8 answers · asked by Steve 2 in Engineering

2006-09-25 07:37:21 · 5 answers · asked by C.C. 4 in Engineering

The strongest binary acid below is _____.
A) H2S
B) H2Se
C) H2O
D) CH4

How do you tell which is stronger?

2006-09-25 07:37:04 · 8 answers · asked by hmmm 2 in Chemistry

if u cnt think of what i am then why do i bother with you?...i owe you nothing but yet i seem to lose a little bit of myself everyday because of you....do u really deserve my protection?

2006-09-25 07:36:44 · 12 answers · asked by Anonymous in Earth Sciences & Geology

r u confident in passing orconfident in failing!!!

2006-09-25 07:35:49 · 4 answers · asked by lewiskyivy 1 in Physics

2006-09-25 07:35:04 · 13 answers · asked by Anonymous in Biology

2006-09-25 07:34:45 · 6 answers · asked by michal d 2 in Astronomy & Space

2006-09-25 07:34:43 · 8 answers · asked by Anonymous in Astronomy & Space

2006-09-25 07:34:25 · 6 answers · asked by Anonymous in Mathematics

It seems that a solar eclipse happened in 30AD and 52AD.

2006-09-25 07:31:56 · 15 answers · asked by Anonymous in Astronomy & Space

2x+2y=7
x²-4y²=8

2006-09-25 07:31:31 · 10 answers · asked by GANGSTA PANGSTA 1 in Mathematics

2006-09-25 07:30:36 · 8 answers · asked by BabyBlues 2 in Biology

I'm not thinking about trying it for fun, just settling a debate here...

2006-09-25 07:29:05 · 6 answers · asked by Anonymous in Other - Science

If the oxidation state of nitrogen is -1.Is there any nitrogen-containing compound that nitrogen will exhibit the oxidation state of -1?

2006-09-25 07:26:20 · 3 answers · asked by lemondevil88 2 in Chemistry

To test out their equipment, supposedly.

2006-09-25 07:25:05 · 9 answers · asked by Pseudo Obscure 6 in Biology

2006-09-25 07:21:44 · 12 answers · asked by busupshot83 1 in Chemistry

A. They are in the elements of the circuit
B. They all come from the battery where they were stored
C. They are created in the battery
D. They are created in the wires by the battery


I thought electrons were just stored in wires. I have no idea. I think its either C or D, any help would be greatly appreciated

2006-09-25 07:21:39 · 6 answers · asked by Diggler AKA The Cab Driver 1 in Physics

r=density
s=acceleration
F=height

r = 1.03 x 10 ^ 3 kg m^ -3
s = 9.8m s ^ -2
F = 145cm

calculate Ew SI unit

2006-09-25 07:21:28 · 8 answers · asked by mitch 1 in Mathematics

2006-09-25 07:19:44 · 14 answers · asked by Anonymous in Biology

2006-09-25 07:17:48 · 10 answers · asked by Anonymous in Biology

2006-09-25 07:17:41 · 5 answers · asked by ugozambidizigidon 1 in Chemistry