Science & Mathematics - 29 November 2007

I've been given the question 2x^2 + 6x =5. Now, this is the first time I've tried to get rid of the coefficient, but the answer I'm getting isn't the same as in the answers. First, I get rid of the first coefficent, making it x^2 +3x =5/2. How would I go about turning that 3x into something I could use to square? And then how would I follow through with the rest of this? Thanks for the help! ^-^

2007-11-29 19:29:42 · 5 answers · asked by Wildfire 2 in Mathematics

An old classmate that I have been talking to on line said that's what her husband does at a school. Never heard of it but figured someone here might know. Thanks

2007-11-29 19:29:21 · 4 answers · asked by nanabanana 2 in Engineering

2007-11-29 19:26:44 · 2 answers · asked by Raunak J 1 in Earth Sciences & Geology

2007-11-29 19:17:02 · 7 answers · asked by Anonymous in Mathematics

If a|c and b|c and gcd(a,b) , then ab|c .
[Hint: By Theorem 2.12, p. 75, since gcd(a,b)=1 , we can write 1 = ax+by for some integers x and y . End of Hint.]

2007-11-29 19:16:58 · 2 answers · asked by garlin104300 1 in Mathematics

2007-11-29 19:16:38 · 1 answers · asked by Dan 1 in Mathematics

2007-11-29 19:15:30 · 3 answers · asked by aliah_natasya2003 1 in Earth Sciences & Geology

prove by binomial theroem

(n choose 0) - 1/2(n choose 1) + 1/3(n choose 2) -............+
[(-1)^n]/n+1 (n choose n) = 1/(n+1)

2007-11-29 19:12:13 · 2 answers · asked by garlin104300 1 in Mathematics

Calculate [CO32-] in a 0.026 M solution of CO2 in water (H2CO3). If all the CO32- in this solution comes from the reaction shown below, what percentage of the H+ ions in the solution is a result of the dissociation of HCO3-?

HCO3-(aq)<---->H+(aq) + CO32-(aq)

2007-11-29 19:07:03 · 1 answers · asked by Kim N 2 in Chemistry

2007-11-29 19:00:21 · 12 answers · asked by *.Jones 1 in Mathematics

Please help me with this question (don't even know why it is related to congruency- pls answer in congruence method). Here goes:

Given that a rhombus is a parallelogram with all sides equal, prove that its diagonals bisect each other at right angles.

Thank you.

2007-11-29 18:46:24 · 2 answers · asked by little zebulon 4 in Mathematics

I have no idea!!!!!!!!

2007-11-29 18:36:07 · 6 answers · asked by Anonymous in Medicine

Assuming one were to somehow bypass the safety latch in some way, what would happen if the microwave were to be run with the door open.

I know that it emits radiation to heat the food, but would this handy device emit radiation into the room?

Safe levels? Hazardous?

And NO - I WILL ABSOLUTELY *NEVER* EVER DO THIS
I'm not stupid, not psycho, and not suicidal!
I'm simply curious, and certainly am not going to attempt it myself. Ever.

So does anyone know?

2007-11-29 18:20:18 · 4 answers · asked by tryandfindus 5 in Physics

please help me. its for physics test tomorrow.

2007-11-29 18:16:02 · 3 answers · asked by dreamer 2 in Physics

2007-11-29 18:10:36 · 20 answers · asked by Anonymous in Weather

2007-11-29 18:09:18 · 3 answers · asked by Kinu Sharma 2 in Mathematics

It's just really annoying.

I wish most people in this section actually cared about the subject.

2007-11-29 18:04:16 · 7 answers · asked by Anonymous in Chemistry

is it synthesis of atp? structural components of cells/tissues? transport of cholesterol? or enzymes?

--please help. im stuck. i thought it was one of the first 2 but i need to be definate. only answer if you are certain!!!!

2007-11-29 17:59:46 · 1 answers · asked by Anonymous in Chemistry

r= 4sin x

r^2= cos x

2007-11-29 17:56:19 · 2 answers · asked by Anonymous in Mathematics

if they are mammals, then shouldnt they have nipples to nurse with

2007-11-29 17:48:04 · 5 answers · asked by Marc L 1 in Zoology

The museum of science in Boston displays a running total of the U.S. population. On May 11, 1993, the total was increasing at the rate of 1 person every 14 sec. The displayed population figure ate 3:45 pm that day was 257,313,431. Assume that the relative growth rate is constant.
a. What is the relative growth rate per year (365 days)?
b. At this rate, what will the US population be at 3:45 pm Boston time on May 11, 2001?

2007-11-29 17:34:11 · 1 answers · asked by thatisme 2 in Mathematics

2007-11-29 17:33:32 · 4 answers · asked by super_miss73 1 in Earth Sciences & Geology

2007-11-29 17:31:56 · 10 answers · asked by super_miss73 1 in Astronomy & Space

V#1 +V#2 = V#3

Where:
V#1 is my velocity
V#2 is the speed of light (from the flashlight)
V#3 is the combined speed of the light and my speeds


since velocity is cumulative (i.e. throwing a baseball out of your car, while your car is going 100 mph would mean the ball would be traveling at least 100 mph as it left your hand depending on how hard you threw it.) wouldn't the light be traveling just faster than the theoretical value we have determined as the speed of light?

2007-11-29 17:30:38 · 4 answers · asked by Null 2 in Physics

3x + 4y = --5

x --3y = --11

i got some ugly numbers for my answers so i am thinking i did somethings wrong, my answers are x= --227/13 and y= 28/13

2007-11-29 17:27:54 · 5 answers · asked by Boo Radley 4 in Mathematics

2007-11-29 17:24:26 · 12 answers · asked by Anonymous in Mathematics

cont. to question: depth and length 35 ft. more than the depth. the pool holds 2000cubic ft. of water. wat are the dimensions of the pool?

2007-11-29 17:20:52 · 5 answers · asked by kenzi 1 in Mathematics

http://www.binoculars.com/binoculars/astronomy-binoculars/meade9x63astronomicalbinocular.cfm#navbar=a

OR
http://www.adorama.com/CN1050UD.html

OR
http://www.amazon.com/exec/obidos/tg/detail/-/B0001A3N58/ref=ord_cart_shr?%5Fencoding=UTF8&m=ATVPDKIKX0DER&v=glance

Thanks in Advance for your help!

2007-11-29 17:20:26 · 5 answers · asked by Anonymous in Astronomy & Space

really nid this asap..plsss...and thnk u^^

2007-11-29 17:15:56 · 5 answers · asked by nid_help 1 in Physics

2007-11-29 17:14:16 · 7 answers · asked by Anonymous in Mathematics