Science & Mathematics - 7 November 2007

Okay well I'll just be honest.. I wasn't paying attention in class. And this book is confusing, as always.

So can someone explain how you get angles measurements from polygons? Like in this picture:http://i18.tinypic.com/814dx8o.gif
And what if it has say.. 17 sides?

How would you find out the measurement of the angles inside, and the angle of X?

And how do you use "180(n - 2)" to get this?
(There was some other equations like this but I forget them).

Please make it simple, thanks.

2007-11-07 14:30:08 · 4 answers · asked by Anonymous in Mathematics

...Thanks...

2007-11-07 14:29:18 · 3 answers · asked by WHAT THE HELL 4 in Mathematics

2007-11-07 14:29:10 · 1 answers · asked by le sabre 4 in Physics

can you simplify this trig problem, and just tell me what you got... i already did it, and i got the Square root of 3, but i think the answer should be neg... any ways, help please...

the identiy used is tan2x = (2tanx) / (1-tan^2 x )

here is the prob..

verify the identity for..
tan 2x when x = Pi/3

so any hep please.. .thanx

2007-11-07 14:27:41 · 5 answers · asked by john doe 2 in Mathematics

A wheel spins in the counterclockwise direction.

(a) If its initial angular velocity was +7.13 rad/s and it rotated an angular displacement of +13.5 revolutions before coming to rest, what was its angular acceleration vector?

(b) How long did the wheel rotate?


Im confused on which equations to use to approach the problem, please help!

2007-11-07 14:24:55 · 2 answers · asked by =P 6 in Physics

1.) 3p^2+p-10
2.) 16y^2-6y-1
3.) 6x^2-x-12
4.) 10n^2-n-2

2007-11-07 14:24:35 · 5 answers · asked by Megan 2 in Mathematics

In cocker spaniels, black is a dominant trait (B), red is recessive (b). Solid color is dominant (D) and white spotting is recessive (s). A red male was mated to a black-and-white female. They had five puppies as follows: 1 black, 1 red, 1 black-and-white, and 2 red-and-white. What are the genotypes of the parents?

I was reading this and i tried solving it. I attempted to use a punnett square (4x4) and place the traits there.. but i kind of got lost. I was wondering if you could help me solve this problem-- i'd greatly appreciate it!

2007-11-07 14:24:28 · 1 answers · asked by Anonymous in Biology

find dy/dx

x^2 + xy + y^2 = 7

2007-11-07 14:24:22 · 5 answers · asked by NEEDs MATH HELP!! 1 in Mathematics

2007-11-07 14:20:43 · 11 answers · asked by Junior 1 in Mathematics

totally enjoying the weather???!!! I opened the windows for the first time finally -- without the AC and it's so freakin refreshing!!! It is wonderful right now.....am I right? (Also on the 2nd floor so pretty safe and can leave them open all night long with minimal security issues).....

2007-11-07 14:17:58 · 6 answers · asked by butterfliesRfree 7 in Weather

2007-11-07 14:17:48 · 9 answers · asked by Junior 1 in Mathematics

a.a plate
b. a joint
c. a fold
d. a fault

2007-11-07 14:17:06 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-07 14:16:37 · 3 answers · asked by Junior 1 in Mathematics

Please explain.

2007-11-07 14:15:14 · 18 answers · asked by Bobby S 3 in Mathematics

prove the identity.

2csc2x = tanx + cotx

2007-11-07 14:13:19 · 2 answers · asked by Anonymous in Mathematics

2007-11-07 14:11:16 · 5 answers · asked by sidello@sbcglobal.net 1 in Engineering

Indicate which organelles are found only in plant cells (P), animal cells (A) or both (B)
Nucleus
Cell Wall
Golgi Bodies
Chloroplasts
Lysosomes
Endoplasmic Reticulum (ER)
Ribosomes
Cytoplasm
Mitochondria
Vacuoles

2007-11-07 14:09:45 · 3 answers · asked by Anonymous in Biology

2007-11-07 14:09:43 · 1 answers · asked by The Magnificent Pinky Ringy 1 in Chemistry

help what is the solution set?

2007-11-07 14:08:03 · 4 answers · asked by creamy goodness 2 in Mathematics

Literal equations? I just learned this today, and it was taught very briefly so I'm getting unsure here and there.

Write the equation in fuction form:
8x + y - 4 = 0

4x + 2y = 14

4y - 4x +4 = 0

I just need help and some explaining. I really appreciate it.

2007-11-07 14:07:45 · 4 answers · asked by Anonymous 1 in Mathematics

what would happen to photosynthesis if all of the three-carbon sugars produced in the calvin cycle were used to make organinc compounds?

2007-11-07 14:06:24 · 3 answers · asked by Jamie'rae 1 in Biology

Is type O the only blood that can't be mixed

2007-11-07 14:05:39 · 4 answers · asked by Smile 3 in Biology

I know the B stands for base, but there is a reason why its capital,

Does it mean the area of the base?

2007-11-07 14:05:32 · 3 answers · asked by Anonymous in Mathematics

The dome of a new building provides a panoramic view of New York. A tourists stands in the center of the dome and has a 12 degree view through one window. What is the approximate diameter of the dome if the window is 18 inches wide?

2007-11-07 14:03:09 · 4 answers · asked by Sellie 2 in Mathematics

A.Dissolution
B.Hydration
C.Hydrolysis
D.Carbonation

2007-11-07 13:59:44 · 3 answers · asked by Anonymous in Earth Sciences & Geology

During 2001, 61.3% of US households purchased ground coffee and spent an average of $36.16 on ground coffee during the year (annual product preference study) ground coffee expenditures for households purchasing approximately distributed as a normal random variable with a mean of $36.16 and a standard deviation of $10.00. used the standard normal cumulative probability table

a. Find the probability that a household spent less than $25.00.
b. Find the probability that a household spent more than $50.00?
c. What the proportion of the households spent between 30.00 and $40.00?
d. 99% of the households spent less than what amount?

2007-11-07 13:59:29 · 2 answers · asked by anamin_1978_01 1 in Mathematics

2007-11-07 13:59:26 · 6 answers · asked by Anonymous in Physics

Find the points on the curve:

x^2 + xy + y^2 = 7

A) where the tangent is parallel to the x axis

B) where the tangent is parallel to the y axis

2007-11-07 13:58:21 · 2 answers · asked by Anonymous in Mathematics

2007-11-07 13:58:08 · 3 answers · asked by Duyen N 1 in Engineering

2 Problems, please help!

1) Saratogo and New York are 180 miles apart. A truck traveled from new york toward saratogaat a rate of 65mph.Another truck traveled for saragota to new york at the rate of 55mph. How many miles did each travel before they met?

2) Two planes started at the same time from the same airport and flew in opposite drections. One flew 60 mph faster than the other. In 5 hours, they were 5,300miles apart. Find the rate of each plane.

I need the equation 2.
Thanks so much!

2007-11-07 13:56:09 · 5 answers · asked by Anonymous in Mathematics