Mathematics - 20 December 2007

how do i integrate square root (4-x^2), with lower limit 0, upper limit pi/2, w/o using substitution? and if i wna use substitution, how do i noe which to choose? y is my tcher's substitution 2sin diter?

2007-12-20 23:50:26 · 3 answers · asked by blahhs 1

x^2-6x=16


2x^2-3x+1=0


x^2-x-1=0

2007-12-20 23:49:08 · 3 answers · asked by Anonymous

Solve for the unknown: s/39.0 = 13.0/2.6
Now i am really confused...help.
Thank you all so very much

2007-12-20 22:52:25 · 3 answers · asked by Sis F 6

I hear most people at school says maths, but i come on here and everyone says math..

I personally say maths..

2007-12-20 22:30:57 · 20 answers · asked by Mitch M 2

Consider the matrices,3A=(3 -6), and, 1/2B=(1.5 3)
>>>>>>>>>>>>>>>>>>>> (9 0) >>>>>>>>> (0.5 -2)

(a) Find the matrices A and B, then compute the matrix, 0.5A – 3B.


(b) Find the matrices, A^–1, B^–1, (AB)^ –1, if possible.



(c)Compare det[(A – B)^3 ], with det[(B – A)^3]. Is this relation specific for only these matrices, or holds in general for all square matrices? Justify your answer.

2007-12-20 22:07:47 · 3 answers · asked by Tahany S 1

Use the definition of the limit to find values of theta that correspond to epsilon = . 75

Round down the answer to the nearest thousandth

lim (4 + x - 3x^3) = 2 as the limit approaches 1

2007-12-20 21:22:57 · 1 answers · asked by Anonymous

2007-12-20 20:51:42 · 5 answers · asked by Know_pro 1

How do I Solve:

2t^2 - 3 = t

(If there is more than one solution, separate them with commas.)

Thanks!

2007-12-20 20:47:10 · 7 answers · asked by Anonymous

[02:27:04] There's a bus with 7 girls
[02:27:05] Each girl carries 7 bags
[02:27:05] Each bag carries 7 big cats
[02:27:05] Each big cat carries 7 smaller cats
[02:27:05] (All the cats have 4 legs )
[02:27:05] Question : how many legs are on the bus ?

Can anyone figure this out?

2007-12-20 19:34:05 · 13 answers · asked by Anonymous

They're wondering what I'm doing and I told them about Y!A haha. They're watching, be nice!!

2007-12-20 19:20:49 · 8 answers · asked by Celeritas 5

2. 2 cars start at the same place and at the same time. One car travels west at a constant velocity of 50 mi/ hr and the 2nd car goes S at 60/ mph. How fast is distance between the 2 changing 1/2 hr later?

2007-12-20 19:08:54 · 3 answers · asked by Sau K 2

With proving the identity.

2007-12-20 18:44:51 · 3 answers · asked by Anonymous

If the sides of a square are decreased by 3cm, the area decreased by 81cm^2. What were the dimensions of the original square? Type a statement that defines what the variable represents.

2007-12-20 18:22:46 · 11 answers · asked by Cindy F 3

Solve analytically.

1) log(2x+3) = -log(3-x)

2) 0.16^(4+3x) = 1.3^(8-x)

3) 3log(x^3) = log(x-1)

4) 12^(0.5x) = 8^(0.1x-4)

*All logs are base of 10.

2007-12-20 18:21:15 · 2 answers · asked by Gemini19 2

Find the value of the polynomial x^3-4x when x=-2

2007-12-20 18:19:11 · 6 answers · asked by Cindy F 3

2007-12-20 18:10:11 · 10 answers · asked by Judy P 1

2007-12-20 17:45:43 · 10 answers · asked by Anonymous

2007-12-20 17:34:42 · 13 answers · asked by Anonymous

question 1: can you help me find the area of ..
(3,5) (6,4) (4,0) (0,3)

question 2: is (-3,0) (0,4) (4,1) (1,-3) best desrbided as a rhombus, rectangle or parallogram or a square

2007-12-20 17:33:05 · 2 answers · asked by Anonymous

I seriously don't understand this problem. The teacher didn't even teach us this and my notes in Algebra aren't helping either. I need an explanation to how it is solved, not just the answer...

2007-12-20 17:22:05 · 4 answers · asked by Anonymous

plz help me to figure this one out

2007-12-20 17:13:47 · 5 answers · asked by tracy 1

2007-12-20 16:52:26 · 7 answers · asked by Anonymous

f(x) = x^2 - 2x + 1
g(x) = x^3 - 3x^2 + 2

find the inflection points
i know the answers but i dont know how to do the procedure
i remember you have to multiply exponents or something
can someone fully explain it to me, step by step ?

2007-12-20 16:43:51 · 4 answers · asked by Anonymous

Hi everyone, I need help with a trig identify problem
http://img180.imageshack.us/img180/6640/70077949cj0.jpg
steps would be greatly appreciated =) thanks

2007-12-20 16:32:49 · 3 answers · asked by PPan 2

How many ways are there to put n balls into r boxes if:

1) Both the balls and the boxes are distinct
2) The boxes are distinct but the balls are not distinct
3) The balls are distinct but the boxes are not distinct
4) Neither the balls nor the boxes are distinct

2007-12-20 16:14:11 · 3 answers · asked by Northstar 7

According to the song, on the 1st day you get a partridge in a pear tree. On day 2, you get 2 turtle doves AND a partridge in a pear tree, thus now having 2 turtle doves and TWO partridges. So at the end of the 12th day, how many of each would you have?

2007-12-20 15:43:21 · 7 answers · asked by Joe M 3

There are 7 s on a bus.

Each has 7 backpacks.

In each backpack, there are 7 big cats.

For every big cat there are 7 little cats.

Question: How many legs are there in the bus?

2007-12-20 15:31:03 · 4 answers · asked by beachblondie 1

Please someone help me with this, the fractions completely push me of track. Thanks.
Solve through substitution:
7y^2+xy=5
77y+x=57

List the 2 solutions.

2007-12-20 15:29:07 · 4 answers · asked by Anonymous

2007-12-20 15:28:07 · 19 answers · asked by Tricia Young 1

Give examples of functions f(x) and g(x) with lim f(x) as x approaches infinity = infinity, lim g(x) as x approaches infinty = infinity, and
a) lim ((f(x))/(g(x))) as x approaches infinity = infinity
b) lim ((f(x))/(g(x))) as x approaches infinity = 6
c) lim ((f(x))/(g(x))) as x approaches infinity = 0
d) Is it possible to have lim ((f(x))/(g(x))) as x approaches infinity = -1? Wither give an example or explain why it is not possible.

I have no idea where to even start this. Any help would be greatly appreciated.

2007-12-20 15:26:51 · 2 answers · asked by cherokeegirls 1