Science & Mathematics - 22 July 2007

I am soooo bad with math, and cant seem to understand square roots.

Thanks so much!

2007-07-22 12:12:56 · 10 answers · asked by Aimee R 1 in Mathematics

four divided by 2 minus 3i
4/2-3i

not sure if im solving this one right thanks

2007-07-22 12:10:57 · 3 answers · asked by jesis332 1 in Mathematics

its what everyone is saying but I really have trouble believing it

so how is it possible

2007-07-22 12:10:37 · 5 answers · asked by Anonymous in Zoology

(-5-2i)^2
simplify . write answer in the form a+bi

need some help here thanks

2007-07-22 12:08:46 · 5 answers · asked by jesis332 1 in Mathematics

How do I change the following equations into y= form so I can graph them!

1. 3x-2y=6

2. 4x=3y-9

Please explain how you did it, thanks!

2007-07-22 12:07:50 · 3 answers · asked by John B 1 in Mathematics

2007-07-22 12:06:47 · 15 answers · asked by Travell B 1 in Mathematics

2007-07-22 12:03:16 · 7 answers · asked by Kay 1 in Chemistry

Evaluate y= (1/2)[ (2x^3)/(3) + 4x^2 + 8x ] @ x= 3
I keep getting the answer 39, but the book answer is 78, anyone know why?

2007-07-22 11:59:04 · 4 answers · asked by superman 4 in Mathematics

their product is diminished by 4. If the first is diminished by 1 and the second is increased by 2, their product is increased by 16. Find the numbers.

2007-07-22 11:56:53 · 5 answers · asked by CPUcate 6 in Mathematics

for example:

f(x) = x^3 + 2x^2 - 5x + 1

there is one local maximun and one local minimun. How do you find them without using a graphing calculator?

2007-07-22 11:54:34 · 8 answers · asked by Anonymous in Mathematics

I know the answer is 6 -square root of 5 but I don't know how it was worked... Please help!!!

2007-07-22 11:51:58 · 4 answers · asked by Stacy806 1 in Mathematics

How can the "big bang" be validated...what came "before" this event...and how can time have a beginning and an end?

2007-07-22 11:50:11 · 7 answers · asked by Mike R 2 in Astronomy & Space

I've been wondering that considering today's high spec materials and manufacturing whether permeable tarmac (or similar) was possible - it probably wouldn't be genuine tarmac, but would serve the same purpose, and would be some new composite material.

I have the idea of a surface using materials technology that would allow water to permeate to the ground while still being hardwearing - a kind of more flexible porous version of our current surfaces. This would go a long way to helping prevent the flooding we've seen that's been blamed on the lack of open land to soak away rainwater.

I'd like to know from those with materials knowledge whether such an idea might be possible, and how? Thanks.

2007-07-22 11:48:27 · 6 answers · asked by Anonymous in Other - Science

Hi all i wanna say thank u all for myn answers on myn last topic. But iam a bit confused now

This is now easy for me u start by *2
x+y=5
2x+3y=13

and than with *-1 etc......

White this
5x - 6y = 45
3x + 8y = -31
i had some prob in the beginning but

4(5x - 6y = 45)
3(3x + 8y = -31)

20x - 24y = 180
9x + 24y = -93
.......i know the answer now x=3 y=-5

=========================================
=========================================
I cant solve this prob

y=2x+4
y=0.5x-2

Normally u start by * a number in this case i will choose 2* and -1 when i do that and continuing that calculation i will get a weird wrong answer i try d almost everything but cant find any logical answer its so confusing



Its the same with this
y=x^2+3x-4
y=x-1

I cant find anything!!
Can some1 plzz help me!!
Can u also explain it and give me some detail plzz

Thank u very much!!!!!!!!!!!!
when i

2007-07-22 11:45:39 · 2 answers · asked by playerr 3 in Mathematics

2007-07-22 11:44:08 · 9 answers · asked by Nick F 1 in Weather

I'm pretty sure the answer to this is "yes" - but if so, how is this allowed? I'm just under 6ft tall and could easily touch the wire, even accidentally if I was waving my arms above my head. Or are they low voltage?

2007-07-22 11:39:51 · 9 answers · asked by YourLocalGP 2 in Other - Science

Chicago is west of Orlando, but they get the sun first.

2007-07-22 11:37:02 · 4 answers · asked by Anonymous in Weather

2007-07-22 11:36:12 · 5 answers · asked by mathstudent 2 in Mathematics

2007-07-22 11:34:15 · 15 answers · asked by PIMP d 1 in Astronomy & Space

7 squared 32m^2 + squared50m^2 -squared18m^2

2007-07-22 11:32:48 · 4 answers · asked by Anonymous in Mathematics

In bridge, the 52 cards of a standard deck are dealt to four players. How many different ways are there to deal bridge hands to four players?

2007-07-22 11:28:54 · 4 answers · asked by TCM 3 in Mathematics

2007-07-22 11:21:28 · 2 answers · asked by stealth_eye 1 in Engineering

2007-07-22 11:15:35 · 4 answers · asked by Anonymous in Weather

Ok so I know that 99.9% of the universe's density is due to dark matter. Any Ideas on this?

2007-07-22 11:15:20 · 11 answers · asked by tha_g_child_2000 2 in Astronomy & Space

–8x + 8 + 10x = 2x + 1

2007-07-22 11:12:24 · 9 answers · asked by Anonymous in Mathematics

i dont know if im right but,i believe the first is a straight line,2nd is a flat square,3rd is a square that has length,width,and height.4th is,err,forgot.and people say that there is a 5th dimension thats sometimes called crunching?? =_=' i dont think i have it right....xD

2007-07-22 10:58:47 · 7 answers · asked by Anonymous in Physics

differential stress gives us a picture of how when force is applied the rock can separate or be crushed. Water defines the chemical reaction....Am I on the right track.....?

2007-07-22 10:53:55 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Arrhenius acids and bases only give up a hydrogen ion or hydroxide ion in a very specific situation. What is that situation?

What types of compounds (with respect to Arrhenius and Bronsted-Lowery acids and bases) will be included in the Lewis acids and bases?

2007-07-22 10:53:26 · 2 answers · asked by AudreySmiles 3 in Other - Science

2007-07-22 10:45:07 · 9 answers · asked by Jack M 1 in Mathematics

a. converting ATP to ADP
b. respiration
c. photosynthesis

2007-07-22 10:44:21 · 3 answers · asked by Anonymous in Chemistry