Science & Mathematics - 23 September 2007

how do i go about proving the following:
let n be a positive integer. prove that n and (n+1) must be relatively prime. help!

2007-09-23 06:39:46 · 4 answers · asked by Anonymous in Mathematics

Its in my mathbook:

On many graphing calculators /x/ (the slanted lines are suppose to be absolute values signs) is denoted by ABS(x). use a graphing calculator to graph the absolute value function.
then use the drace feature TO FIND THE CORRESPONDING X VALUES FOR THE GIVEN Y VALUES.


i dont understand the caps part.

heres on of the qustions y=/x+14/ ; y=9


i know how to graph the first equation and then press trace on my graphing calculator but then wuts up with the nine? do i have to do any other math?

2007-09-23 06:37:45 · 2 answers · asked by مدينا Medina ☪ 6 in Mathematics

put meteorite,pulsar,quasar,sun,white dwarf,galaxy,super giant,moon,neutron star,black hole,comet,red giant,solar system,nebula,planet,asteroid, put them in order by size (smallest to largest)and why they are in that order

2007-09-23 06:36:16 · 5 answers · asked by Anonymous in Astronomy & Space

y=2cos1/2 (x- π)-2

so far i have...
period=2 π
horizontal shift= π

i need to find
Amplitude (A)
Veritical Shift (VS)

2007-09-23 06:33:54 · 3 answers · asked by Alisha H 1 in Mathematics

ok i have no idea how to do ym math homework. there are 5 questions but if someone explains the first to me it will probably be all that i need.:

In a dance class 2/7 of the men are married to 1/5 of the women. What fraction of the dance class is women.

i kinda had somthing goin but am completly confused. Please help somebody =]

2007-09-23 06:33:04 · 3 answers · asked by Allie B. 2 in Mathematics

C'mon, we have all heard the story about the great flood of Noah's time where it rained for forty days and forty nights and the water covered the entire earth. Get real here. Had it indeed rained that much as it rained toward the polar ice caps it would have frozen. Makes more sense that you have to melt the ice caps first ,which would have increased the depths of the oceans covering land masses beyond our comprehension. The global warming would have an effect on our weather as it is doing so now and could possibly have caused the "forty days and nights" of rain, increasing the depths of the water yet again. what do ya'all think?

2007-09-23 06:24:45 · 7 answers · asked by grum_ma 1 in Earth Sciences & Geology

i want to see atlanta ga. from outerspace

2007-09-23 06:18:50 · 9 answers · asked by Anonymous in Geography

Isoctane Balanced Equation: C8H18 + 11O2 --> 8CO2 + 6H2O

Assuming gasoline is 100% isoctane with density 0.692 g/mL. What is the theoretical yield of carbon dioxide produced by the combustion of 1.2 * 10^10 gal gasoline (approx. annual consumption of gasoline in U.S)?

2007-09-23 06:16:21 · 2 answers · asked by choco 1 in Chemistry

2007-09-23 06:15:49 · 7 answers · asked by G 1 in Mathematics

How do I get from x(x+1)=42 to x=6
I'm really stumped. I worked out the answer but I cant understand how to get the answer through solving the equation...

2007-09-23 06:13:23 · 8 answers · asked by Anonymous in Mathematics

Hi, i found a factorization example on a book but i didn't know how they got *

A=10x^2-15x
A=5x*2x-5x*3
A=5x(2x-3)

2007-09-23 06:11:19 · 6 answers · asked by Anonymous in Mathematics

There is a 1500 kg boat that's bobbing up and down in the waves in a lake, while its tied. The amplitude for its simple harmonic motion is 20 cm and the period is 3.5 s. When the boat is at its highest point, its deck is at the same height as the stationaty dock. A man (60 kg) is on the boat, and he wants to leave the boat when it is within 10 cm of the dock level. How much time does he have to board the boat comfortably during each cycle of up-and-down motion?

2007-09-23 06:09:58 · 1 answers · asked by Wolfgang M 1 in Physics

2007-09-23 06:09:23 · 11 answers · asked by Anonymous in Chemistry

A subway train starting from rest leaves a station with a constant acceleration. At the end of 5.59 s, its is moving at 9.9502 m/s. What is the train's displacement in the first 4.26517 s of motion? Answer in units of m.
When I used the formula d = v1t + 1/2at^2 I got 27.81 m which turns out to be the wrong answer. Please help!

2007-09-23 06:08:49 · 2 answers · asked by jon s 2 in Physics

2007-09-23 06:08:22 · 7 answers · asked by josh s 1 in Chemistry

There was a black widow out in my yard, and I was bouncing a ball, do the bites hurt?

2007-09-23 06:06:05 · 8 answers · asked by ♥PomsGirl101♥ 4 in Zoology

2007-09-23 06:06:03 · 3 answers · asked by lisa S 1 in Mathematics

2007-09-23 06:03:13 · 8 answers · asked by Anonymous in Mathematics

The length of a flag must be 1.5 times the width, and the area of the flag must be between 60 square inches and 300 square inches. What are the possible whole-number dimensions for the flags?

2007-09-23 05:59:02 · 2 answers · asked by The One 1 in Mathematics

Want to understand the work involved

2007-09-23 05:57:23 · 2 answers · asked by Robert 1 in Mathematics

2007-09-23 05:54:14 · 7 answers · asked by robert_follows 1 in Geography

I know an endothermic reaction is when heat is absorbed, but is that a chemical or a physical reaction? Please help me be less confused about science!

Thank You!

2007-09-23 05:51:14 · 6 answers · asked by Hello! 3 in Chemistry

2007-09-23 05:47:06 · 3 answers · asked by nothingspecial 1 in Mathematics

Is the wet capacity of an oxygen tank the same with other cylinders (i.e. acetylene cylinder, SCUBA cylinder)?

2007-09-23 05:38:09 · 1 answers · asked by boyong 1 in Other - Science

2007-09-23 05:37:42 · 8 answers · asked by ZuhairFakhouri 1 in Zoology

...that has been able to see images as small as atoms, although barely visibly. Does anyone know where I'd be able to see any pictures they took of them?

2007-09-23 05:37:14 · 1 answers · asked by J 2 in Physics

2007-09-23 05:37:04 · 2 answers · asked by Lady_GaGa.luvr! 4 in Chemistry

A 4 hp lawnmower engine moves with a force of 1,492 N over a distance of 100.0 m. How much time did this require?

2007-09-23 05:32:58 · 1 answers · asked by Anonymous in Physics

2007-09-23 05:27:58 · 2 answers · asked by Julie B 1 in Medicine

I got the other ones and everyone helped a lot, I'm very grateful...anyway, last one of the day..

A ball is thrown straight up and returns to the thrower's hand after 3s in the air. A second ball if thrown at an agle of 37 degrees with the horizontal. The acceleration of gravity is 9.8 m/s^2.

At what speed must the second ball be thrown so that it reaches the same height as the one thrown vertically? Answer in units of m/s.

2007-09-23 05:27:53 · 1 answers · asked by MD12 2 in Physics