Science & Mathematics - 4 July 2007

if so, which one and why.

2007-07-04 11:33:34 · 14 answers · asked by YES, I use correct grammar! 3 in Astronomy & Space

prove that if 2/3x= -8, then x=12.
given: 2-3x= -8.
prove: x=-12

statements:
a. 2/3x= -8
b. 2x= -24
c. x= -12

reasons:

a.
b.
c.

prove that if 5=2-1/2x, then x= -6.
given: 5=2- 1/2x
prove: x= -6

statements:
a. 5=2- 1/2x
b. 2- 1/2x=5
c. 2(2- 1/2x)=10
d. 4-x=10
e. -x=6
f. x= -6

reasons:

a.
b.
c.
d.
e.
f.

prove that if 2x-7-1/3x-2, then x=3.
given: 2x-7=1/3x-2
prove: x=3

statements:
a. 2x-7=1/3-2
b. 3(2x-7)=3(1/3x-2)
c. 6x-21=x-6
d. 5x-21= -6
e. 5x=15
f. x=3

reasons:

a.
b.
c.
d.
e.
f.


thanks so much.
<3; ms aungg.

2007-07-04 11:31:24 · 3 answers · asked by BaBy GiRl 1 in Mathematics

Why do they have the tendency to fly around in "circles" (actually with sharp angles) in the middle of the division (when inside the house) or just in one place (when outside), instead of covering the entire room or a larger area?

2007-07-04 11:30:40 · 4 answers · asked by Butterfly 2 in Zoology

2007-07-04 11:29:47 · 13 answers · asked by Panzerlair 1 in Astronomy & Space

... how would we have known that planet existed at all?

Ineed, any planetary body that was ALWAYS on the other side of the Sun from us at all times?

I know it's an unlikely coincidence, but no more unlikely than the Moon being closer than the Sun to the Earth by almost exactly the same factor as it is smaller than the Sun (enabling perfect Solar eclipses to occur)... surely?

Thanks for all answers.

2007-07-04 11:25:53 · 6 answers · asked by Anonymous in Astronomy & Space

what a good book on getting started with building or rather modifying chips?
can a hardware be restablished or fixed once its magnetized by an electrical impulse.
can parts of a hardware be magnetized and still be functioning?

2007-07-04 11:20:56 · 1 answers · asked by Anonymous in Engineering

For what value of b in the equation 2x + 3b – 3 = 4x – 3b will the solution for x be 3?

2007-07-04 11:19:27 · 7 answers · asked by wizzdom13 1 in Mathematics

with Lambda = 4, wich is the probability of more than 5?

I stated it as: 1 - P (x <= 5) but apparently it was wrong...

2007-07-04 11:18:58 · 2 answers · asked by studentin.. 1 in Mathematics

I hear primordal soup was where life started. What is this mix and can it be duplicated in the lab and will life start again? Is this testable or pure speculation?

2007-07-04 11:18:56 · 5 answers · asked by james h 2 in Chemistry

I need help answering these. Its fine if you could only answer one. Thanks for your help.
1) 1000 mg=____g 2) 1 L=____mL
3) 160 cm=____mm 4) 14 km=____m
5) 109 g=____kg 6) 250 m=____km
7) 1 m=____cm 8) 1 cm=____mm
9) 1 km=____m

COPMARE USING <,> or=
10) 56cm__6m 11) 7g__698mg

WHICH IS LARGEST?
12) 14mm or 1cm 13) 334m or 1km
14) 1m or 990cm 15) 145m or 145km
16) 3.4cm or 30mm 16) 10 km or 1000cm

2007-07-04 11:18:38 · 3 answers · asked by <C0nSPirAcY> 4 in Mathematics

What is another way to write 3 /^12?

2007-07-04 11:15:42 · 5 answers · asked by wizzdom13 1 in Mathematics

you have two angles and one side of a triangle. the angles are on the two ends of the known side, what's the best way to find the lengths of the other two sides?
it seams like with the two know angles and a known side (and in the same place) it should be simpler (more simple) than what I am finding by searching. is there a better way when it is set up like this?

tangent to angle: "what's your "sine"?"

2007-07-04 11:15:17 · 4 answers · asked by not a duck 1 in Mathematics

I can find this limit graphically ( .5 ) - and with a table -- but I can't figure out the analytical...
Can anyone point me in the right direction to prove that the limit = 1/2 ?
I appreciate it!

2007-07-04 11:15:04 · 3 answers · asked by Speed Ski 1 in Mathematics

9,_,16 and 4,_,5.76

2007-07-04 11:13:03 · 2 answers · asked by Anonymous in Mathematics

Let (P_n) be a sequence of polynomials with real coefficients for which there exists a positive integer m such that degree(P_n) <= m for every n. Show that, if (P_n) converges for m +1 pairwise distinct elements of R, then (P_n) converges on R to a polynomial P. (Hint: Consider Lagrange Interpolation Formula)

Show that this conclusion may fail if the sequence (degree(P_n)) is unbounded.

2007-07-04 11:12:12 · 3 answers · asked by Steiner 7 in Mathematics

I've been wondering about this. I'm also curious as to know how we could shield the astronauts from the effects, would the effects be present on the Martian surface, and how can we test for possible methods of shielding and the effects of these radiations? I saw an article recently on how some fungi use radiation as an energy source - perhaps that is one way.

2007-07-04 11:10:49 · 5 answers · asked by Paul Hxyz 7 in Astronomy & Space

why does it rotate?

2007-07-04 10:59:10 · 11 answers · asked by Laurize 1 in Astronomy & Space

h=4t^2+16t+5
when is the bullet at its highest point?
when will the bullet strike the ground?
what is the max height the bullet will attain?

2007-07-04 10:59:02 · 6 answers · asked by Linda S 1 in Mathematics

I think ppm means 'parts per million'
But does the 'wt' stand for (example 500 wt ppm of water)

2007-07-04 10:56:44 · 4 answers · asked by MichelleMcD81 2 in Earth Sciences & Geology

I really need help with this one.

2007-07-04 10:49:20 · 4 answers · asked by casey c 1 in Mathematics

Let A be an uncountable subset of R. Then, A contains a subset S, composed of at least 2 elements, with the so called "in between" property, that is: for every distinct elements x and y of S, there exists z in S such that x < z < y.

2007-07-04 10:48:30 · 1 answers · asked by Steiner 7 in Mathematics

Could someone tell me what would be left if I took 15% off 54 and could you show your workings.
thanks

2007-07-04 10:44:09 · 40 answers · asked by Shakey_101 2 in Mathematics

Is there a formula to solve a quadratic equation when f(x)=0 and they give you one solution with a vertex and asking to solve for the other solution.
If not How would I solve this.

2007-07-04 10:37:56 · 3 answers · asked by Anonymous in Mathematics

2007-07-04 10:33:19 · 10 answers · asked by Heather A 2 in Biology

Hi could someone tell me what number is a factor of every counting number

2007-07-04 10:27:19 · 12 answers · asked by Shakey_101 2 in Mathematics

I would love to train as a paranormal investigator but don't know how to get started. Any help would be appreciated

2007-07-04 10:17:18 · 15 answers · asked by Anonymous in Paranormal Phenomena

simplify the expression
1. sqrt (5) ( 6sqrt(2) - sqrt(5) )
2. 4/sqrt(20)
solve the equation
3. sqrt (3x) - 6 = 0

2007-07-04 10:15:57 · 5 answers · asked by Berry A 2 in Mathematics

2007-07-04 10:09:47 · 1 answers · asked by patrick o 2 in Chemistry

Could you please help me with the working out? Thanks in advance guys!!!

From a point 10m from a vertical wall, the angles of elevation
of the bottom and the top of a statue set in the wall are 40o and
52o. Calculate the length of the statue.

A rectangular paving stone 3m by 1m rests against a vertical wall as shown. What is the height of the highest point of the stone above the ground?

Tahh x

2007-07-04 10:01:50 · 5 answers · asked by Anonymous in Mathematics

2007-07-04 09:58:23 · 17 answers · asked by Quo 2 in Astronomy & Space