Mathematics - 18 December 2007

HELP!!!!!!! I NEED AN ANSWER FOR THIS EQUATION PLEEZ!!!!!!! ITS DUE TOMORROW DEC 19TH 2007!!!!!!! HELP!!!!!!!

2007-12-18 13:42:40 · 8 answers · asked by nini a 1

Factor the expression 11(x + y) - 19 t(x + y)

Factor the polynomial 7 a ^8 b^ 9 c^ 7 - 21 a^ 9 b^ 7 c ^8

Factor 17 x ^2 + 17 x y + 19 x + 19 y by grouping

2007-12-18 13:41:06 · 4 answers · asked by Abena 2

Thanks

2007-12-18 13:36:33 · 4 answers · asked by Anonymous

It's a method of factoring but I forget how to put it into my calculator... Any suggestions are appreciated!

2007-12-18 13:31:07 · 1 answers · asked by Anonymous

I've been really struggling with this question.
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Let {[x_j,y_j]}_(j>=0) be a sequence of closed, bounded intervals in R, with x_j<=y_j for all j>=1.

Suppose that the intervals which make up this sequence are disjoint, i.e. [x_j,y_j]∩[x_k,y_k] = Ø for j≠k.

Is it possible that R=U_(k>=1) [x_k,y_k]?

Hint: What sort of subset in R must be then be formed by the endpoints U_(k>=1) {x_k,y_k}
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Thank you so much!

2007-12-18 13:30:26 · 2 answers · asked by Theodore E 1

This is an optimization problem in calculus.

An offshore oil well is 2 kilometers off the coast. The refinery is 4 kilometers down the coast. If laying pipe in the ocean is twice as expensive as on land, what path should the pipe follow in order to minimize the cost?

What are the steps to arrive at this answer and what is the final answer? Any and all help would be greatly appreciated!

2007-12-18 13:19:33 · 2 answers · asked by Anonymous

http://tinypic.com/view.php?pic=8eli44o&s=1

2007-12-18 13:16:45 · 2 answers · asked by Anonymous

Find the limit: lim x→1 (2- 5/(x-2)^2

2007-12-18 13:11:59 · 5 answers · asked by Anonymous

If two dice are rolled, what is the probability of rolling a sum of 8 or a sum that is odd?

2007-12-18 13:07:11 · 7 answers · asked by calleighismygirl 1

Can i get a problem that i can do a project on
im in 9th grade

2007-12-18 13:04:32 · 1 answers · asked by Anonymous

find the exact values of sin 2u, cos2u, and tan 2u using the double-angle formulas:

Sec u = -(5/2)

pi/2 < u < pi

2007-12-18 13:03:22 · 1 answers · asked by Anonymous

2007-12-18 13:02:09 · 23 answers · asked by tomman1691 2

2007-12-18 13:00:02 · 2 answers · asked by jarheadbrat@sbcglobal.net 1

Find the center of mass of the lamina which occupies the portion of the circle x^2 + y^2 <= 1, which is in the first quadrant and has density of rho(x,y)= x*y.

first, i calculated the mass: m= [0,1]int [0,1]int x*y dxdy
the mass i got was (1/4).
second i calculated x-bar (x coordinate):
4*[0,1]int[0,1]int x*x*y dxdy = x coordinate
x-coordinate = (4/6)=(2/3)
third, i calculated the y bar ( y coordinate):
4*[0,1]int[0,1]int y*x*y dxdy = y coordinate
y-coordinate = (4/6)=(2/3)

so the center of mass is (2/3,2/3). Is that correct? I just feel awkward seeing both coordinates equal. Is that what should happen in a circle or is it because the density function was just too simple and perfect?

2007-12-18 13:00:01 · 2 answers · asked by Kala J 3

1. the expresion sin2x / 2cosx (sine 2 theta over 2 cosine theta) is equivlent too
a:sinx
b:cosx
c:tanx
d.cotx

2. which of the followiwng is the range of cos2x
a: -1 ≤ y ≤ 1
b: -2 ≤ y ≤ 2
c: -90 ≤ x ≤ 90
d: 0 ≤x ≤360

2007-12-18 12:53:13 · 1 answers · asked by Kelly S 1

find the exact value between 0 and 2pi:

(sin2x + cos 2x)^2 = 1

2007-12-18 12:49:22 · 5 answers · asked by Anonymous

Maggie is running for class president. A poll revealed that 40% of her class made voted for her. 32% voted for her opponent. 7 voters are undecided. Maggie needs 50% of the vote to win. How many of the undecided votes does she need to win?

I think that I should make it into a whole, but sadly, I don't know how. Help?

2007-12-18 12:47:12 · 19 answers · asked by dqsmarty@sbcglobal.net 2

show steps

2007-12-18 12:45:27 · 4 answers · asked by Kelly S 1

i know you factor by grouping but i got x^2(x-2)25(-x+2) can you go any further?

2007-12-18 12:40:36 · 7 answers · asked by Anonymous

i need to know what it looks like?

2007-12-18 12:37:26 · 3 answers · asked by emmajane d 1

If there are nine ladies dancing and the probability of a dancing lady accepting an invitation to dance is .18, then what is the expected number of ladies you would have to ask before one accepts???

2007-12-18 12:33:22 · 4 answers · asked by Anonymous

Solve for K. Thanks for the help!

[h-2 5 ] [-3] = [2h-4]
[4 2+2k ] [4 ] [5k=10]

2007-12-18 12:23:13 · 2 answers · asked by Anonymous

x^2-kx+36=0 can you explain what this means?

and...


for what real values of k do each of the following quadratic equations have 2 real and distinct roots? kx^2+x+1=0

2007-12-18 12:20:36 · 3 answers · asked by Caramel 1

2007-12-18 12:10:19 · 3 answers · asked by scurvyirvy 2

the nurse takes 4 min. to take temp. etc. she waits another 17 min. for dr. what time does Dr. come in?

2007-12-18 12:10:02 · 3 answers · asked by latesleeper17 1

In the study of immunology how are the use of mathematics used? Specifically polynomials and radicals?

2007-12-18 12:05:24 · 1 answers · asked by R W 1

2007-12-18 12:04:19 · 48 answers · asked by Anonymous

x cubed minus 8.....in other words
x3-8
^ it means x cubed
I cannot factor the equation!!!! plz help!!!

2007-12-18 12:01:37 · 5 answers · asked by anicento@sbcglobal.net 1

Consider the region R bounded on top by z=1-x and on the side by y=1-x^2 which lies in the first octant.

a- sketch the region R. (I'm working on it now)
b- Find the volume of the region R. ( I know i have to triple integrate but i don't know what the interval limits or integrand should be. I need to know how to set up the integration.)

thank you for your time.

2007-12-18 11:33:20 · 1 answers · asked by Kala J 3

Given that -1 is a zero of f(x)= x^4 + 5x^3 -4x^2-16x-8, find the remaining zeros.

2007-12-18 11:14:24 · 1 answers · asked by Anonymous