Mathematics - 7 December 2007

2007-12-07 15:36:30 · 12 answers · asked by Anonymous

2007-12-07 15:14:45 · 9 answers · asked by hello 3

2007-12-07 14:17:23 · 4 answers · asked by jiles357 1

For the first problem, we have "Point P is on the x-axis, 13 units from point C(7, 5). What are the possible measures of the angles?"

Second, I have "What are the coordinates of the point P on the x-axis such that the slope
of a line from P to A(1, 4) is twice the slope of a line from P to B(9, 10)?"

2007-12-07 13:59:28 · 7 answers · asked by Hibba 4

Would really like to know what the fomula is for converting oven temperatures from Farenheit to Celius etc.

Appreciate any advice!

2007-12-07 13:41:35 · 14 answers · asked by Bradley 1

How do I get the complex cube root of 8

2007-12-07 12:31:54 · 1 answers · asked by Kevin M 1

A string of n left and n right brackets is said to be balanced if each right bracket has a matching preceding left bracket and each left bracket has a matching subsequent right bracket. Here is a balanced string of 4 left and 4 right brackets: () ( () () )
How many different balanced strings can one form with 4 left and 4 right brackets?



i managed to count 13 possibilities?
can anyone confirm this, or are there more??

thanks in advance!

2007-12-07 11:38:34 · 2 answers · asked by PeterW 1

Hey guys,

I am supposed to find a matrix A whose null space is exactly the subspace of R^4 spanned by the following vectors:

Vectors here: http://www.so-easy.info/nullspace_q.gif

I'm having a hard time figuring this out. If you can do it, can you please explain how you did it?

Thank you for your help!

2007-12-07 11:38:14 · 2 answers · asked by Areeb B 1

A. 2x + y = 3
B. –x + 2y = 1
C. 2x + y = 4
D. x + 2y = –4

2007-12-07 11:33:14 · 3 answers · asked by shelby_2218 2

If you have an answer, please contact me but do not post it here.

2007-12-07 11:28:48 · 4 answers · asked by i_am_the_coconuts 1

How would you solve nP6 = 5*(nP5)?

I got to n!/(n-6)! = 5(n!)/(n-5)!, but I don't know how to cancel out the factorials. Please help

2007-12-07 11:27:44 · 2 answers · asked by Nathan 3

Seven women go to the farmers market.One has 20 apples,one 40,apples,one 60, one 80,one 100,one120,and the last 140. They decide they will have a uniform pricing strategy.Each selling their apples for the same price.They decide on a 2-tier pricing structure something like: 4 for 12 cents and 1 for 5 cents...
At the end of the day, they all sold their lot of apples and each ends up with the same amount of money. There is an answer. There are no tricks.
What 2-tier pricing structure did they decide on???

2007-12-07 11:26:43 · 1 answers · asked by jahmin21606 1

Is there a way to calculate pi or any irrational number digit by digit using an iterative algorithm. At each iteration, you get a new digit. Instead of the convergent method.

This would be much more convenient with computers.

2007-12-07 11:22:28 · 5 answers · asked by Anonymous

The equilibrium constant Kc for the equation


CS2(g) + 4H2(g) = CH4(g) + 2H2S(g)


at 900oC is 27.8. What is the value of Kc for the following equation?


1/2CS2(g) + 2H2(g) = 1/2CH4(g) + H2S(g)

2007-12-07 11:18:59 · 3 answers · asked by Joe C. 1

given g(x)=-3x+2
find g(5n)

2007-12-07 11:00:10 · 7 answers · asked by Anonymous

(3a – 2)(a – 1) ?
a) 3a2 + a – 2

b) 3a2 – 5a + 2

c) 3a2 – 6a – 2

d) 3a2 + 6a + 2



54a^4b^3
-------------- division line
81a^3b^2

a)2/9ab
b)2/3ab
c) 2a
-------- division line
3b
d)6/7ac



8x^3y-4x^2y^3-12xy
----------------------------- division line
4x^2y^2

2007-12-07 10:56:44 · 5 answers · asked by Anonymous

Alan, Ben, and Cal are seated as shown with their eyes closed. (3 chairs in a vertical row, so you see the persons head in front of you, in the order of Alan first, Ben in the middle, and cal last.)

Diane Places a hat on each of their heads from a box they know contains 3 red and 2 blue hats. They open their eyes and look forward.

Alan says, "I cannot deduce what color hat I'm wearing."

Hearting that, Ben says, "I cannot deduce what color I'm wearing either."

Cal then says, "I know what color I'm wearing!"

What color is Cal wearing and how does he know?

**Please Help me with this problem! Also please show your work and what you did to get the answer so i could understand what you did :) thankes!!

2007-12-07 10:41:28 · 5 answers · asked by Anonymous

Okay, I'm not sure I'm getting this...
Take this problem for example:6/10 x 45/18 x 15/48
Okay this is what I do, I factor them down 3x2 9x5 5x3 for the numerators, and 5x2 9x2 and 24x2 for the denominators, and I end up doing 3x3 = 9 and 2x2=4+24=28 and I said 9/28 when the answer aucctly turns out to be 15/32
Wtf am I doing wrong?

2007-12-07 10:25:30 · 7 answers · asked by Anonymous

2007-12-07 10:24:35 · 12 answers · asked by Anonymous

2007-12-07 10:23:42 · 9 answers · asked by Anonymous

be sure to give me the right answer

2007-12-07 10:10:36 · 30 answers · asked by Anonymous

can someone show me how to do this problem?

2007-12-07 09:53:25 · 3 answers · asked by Anonymous

expressed in hours, can someone please show me how to get to the anwser

2007-12-07 09:48:04 · 2 answers · asked by Anonymous

1. (a) consider a function f such that f'(x) exists for all real x. Suppose that
(i) f'(r) = 0 anf f'(s) = 0
(ii) f'(x) does not equal to zero for all x in the interval r Prove that there is at most one root of f(x)=0 in r
(b) Given a function f such that f'(x)=(4-x^2)(4+x^2)e^-2x. what is the maximum number of real roots of f(x)=0 in -2

2007-12-07 09:46:02 · 4 answers · asked by leonardo 1

Four pencils and six pens cost $2.12. Two pencils and 12 pens cost $3.58. Find the cost of a pencil and the cost of a pen?

2007-12-07 09:18:49 · 7 answers · asked by Jeanette50 1

.
PLEASE LABEL ANSWERS AND EXPLAIN BRIEFLY!
.
A) Cathy takes the bus home from work. In her hand she holds a 2.0 kg cake box, tied together with a string. As she ascends the steps into the bus, the box accelerates upward with a rate of 2.5 metres/seconds^2. What is the force exerted on the string?

B) Cathy sets the box on the seat beside her. The bus accelerates from the rest to 60.0 km/hour in 4.0 seconds, and the box begins to slide. What is the coefficient of static friction between the box and the seat of the bus?

C) A taxi suddenly cuts in front of the bus, causing the bus driver to slam on the brakes. The bus driver reduces speed from 60.0 km/h to 20.0 km/h in 1.5 seconds. Does Cathy’s cake slide forward?

2007-12-07 09:10:21 · 2 answers · asked by Anonymous

dy/dx = 10 - 8x; y(0) = 40

What is the particular antiderivative of each derivative that satisfies the given condition???

2007-12-07 08:58:21 · 4 answers · asked by Anonymous

"At time t = 0, a single-engine military jet is flying due east at 12mi/min. At the same altitude and 208 mi directly ahead of the military jet, still at time t = 0, a commercial jet is flying due north at 8 mi/min. When are the two planes closest to each other? What is the minimum distance between them?"

2007-12-07 08:56:11 · 5 answers · asked by Anonymous

UNIT 3, LESSON 11, PAGE 32

24. Peter and Jon and playing a game of tug-of-war on a frictionless, icy surface. Peter weighs 539 Newtons and John weighs 392 Newtons. During the course of the game, John accelerates toward Peter at a rate of 3.0 metres/second^2.

A) What is the magnitude of the force that Peter exerts on John?

B) What is the magnitude of the force that John exerts on Peter?

C) What is the magnitude of Peter’s acceleration toward John?

D) Sarah decides to join the game as well. Now Peter pulls on Sarah with a force of 45.0 Newtons [E], and John pulls on her with a force of 25.0 Newtons [N]. What is Sarah’s resultant acceleration, if she weighs 294 Newtons?

2007-12-07 08:55:52 · 1 answers · asked by Anonymous

If you are doing a Secret Santa gift game with 25 people, what are the odds of picking your own name?

Let's assume everyone writes their own name on a slip of paper, tosses it into a hat, and then everyone pulls a name from the hat. What are the total odds that one of the 25 people would pull their own name from the hat?

TO CLARIFY: I am asking the odds that when all 25 people open their slips of paper, what is the likelihood that ANY ONE of them has pulled their own name. Not the odds for any one individual (1/25), but for the group as a whole.

Thanks!

2007-12-07 08:52:20 · 4 answers · asked by Secret Santa Question 1