Mathematics - 8 June 2007

2007-06-08 23:44:44 · 10 answers · asked by Anonymous

It's what Americans are stereotype in some country?

2007-06-08 23:27:01 · 12 answers · asked by Anonymous

2007-06-08 23:16:39 · 10 answers · asked by Anonymous

2007-06-08 23:07:55 · 21 answers · asked by Anonymous

In how many ways can nine students be partitioned into three teams containing four, three, and two students respectively?

2007-06-08 22:30:32 · 5 answers · asked by kash 1

I tried this question but it seemed that both the cos x and e^x wont disappear.
how do you integrate:
e^x * cos(x) dx

I tried this question but it seemed that both the cos x and e^x wont disappear.

please show the steps
thanks!

2007-06-08 21:35:37 · 8 answers · asked by jonathantam1988 2

If you are traveling at 78 miles per hour, then how many feet per second are you traveling?

2007-06-08 21:25:33 · 5 answers · asked by Anonymous

2007-06-08 21:17:22 · 6 answers · asked by r s 3

2007-06-08 21:11:40 · 14 answers · asked by morphjk 1

2007-06-08 20:42:33 · 2 answers · asked by Anonymous

2007-06-08 20:41:59 · 2 answers · asked by Anonymous

2007-06-08 20:41:22 · 5 answers · asked by Anonymous

Write an equation for a circle with center at P(2, -5) and a diameter of 8 units.
(x - 2)^2 + (y - 5)^2 = 64
(x + 2)^2 + (y + 5)^2 = 8
(x - 2)^2 + (y + 5)^2 = 16
(x + 2)^2 + (y - 5)^2 = 16

2007-06-08 20:40:31 · 4 answers · asked by Anonymous

So the college I'm attending is having a math placement test next week and they sent a review packet for us to do. I've got most of them down, but there are a few problems that I couldn't find help in from either the review packet or my old math text books. If you could help, that would be greatly appreciated.


1. A factor of (4/9)y^2 - 81 = ?

2. If 2x + ax/b = 2, then x = ?

3. (16x^8y^-4)^3/4 = ?

4. x^(2-k) / x^(5-2k) = ?

5. A factor of x^4y^2 - 2x^3y^3 - 3x^2y^4 = ?
[[The equation should read x to the power of 4 times y to the power of 2 minus... etc.]]

6. log base 1/2 [1/16(1/2)^-9] = ?

7. (x/y) - (y/x) / x^2-y^2 = ?

8. A factor of 12x^2+x-6 =?

9. One of the roots of x^2+2x-5=0 is ?
[I'm thinking using the quadratic equation, but my answer didn't come out in any of the selections.]

10. If log z = 2/3 log x-2 log y, then z=?

Really appreciate if you could help answer all of them (Show some work so I understand please) by Sunday, since the test is Monday! Thanks!

2007-06-08 20:07:46 · 3 answers · asked by Anonymous

for example if a question asks "find the perimeter of a circle with an area of 63.7

2007-06-08 19:41:03 · 14 answers · asked by Anonymous

How do you find the pt. of intersection of the liens: 3x-y-7=0 and x+5y+3=0?

2007-06-08 19:30:10 · 6 answers · asked by Haya 1

2007-06-08 19:09:22 · 6 answers · asked by dr1ft_king 1

Please explain how to rationalize the denominator of 4 / 6 - square root of 5, explain how the denominator gets rationalized.

2007-06-08 18:59:36 · 6 answers · asked by N/A 6

Given that the coefficient of x² in the expansion of

( 1 + px )^4 * ( 1 + qx )^3

is -6, and that

p + q = 1,

find the values of p and q.

The answers are:

p = 2, q = -1

or

p = -2, q = 3.

I know how to expand the equations... choose and everything. But apparently there's a less tedious way to find out the coefficient of x² with multiple expansions.

For a simpler one, such as (1+4x)(2-x)^6, I know that you get two terms with x²:

(1)......1*15(2^4)(-x)² = 240x²
(2)......4x*(6)(2^5)(-x) = -768x²

(1)+(2) = -528x²

And hence you get the coefficient of x².

But for (1+px)^4 * (1+qx)^3, it's obviously different because both expansions have powers and henceforth I'll have to multiply certain terms here and there to get the final coefficient of x² ... it's too complicated, though, if I'll have to expand everything. Is there a simpler way to do it, and could you provide a working? Thanks!

2007-06-08 18:51:41 · 4 answers · asked by kimiessu 2

please give me the answer for australia and europe,.. how many million in 1 billion?

2007-06-08 18:47:57 · 12 answers · asked by madzz 3

9:
x/x+1 –1/x=1
a)1/3
b)1/2
c)–1/2

10:
1/x+1=x-1/x+5/x
a)–2
b)2
c){-3,-2}

2007-06-08 18:45:43 · 6 answers · asked by ~♥♥♥~ 3

7:
3/x-2/5x=13
a)1/5
b)1/3
c)1/8

8:
2/5x+1 – 2/3x+5=0
a)1
b)3
c)1/3

2007-06-08 18:44:02 · 8 answers · asked by ~♥♥♥~ 3

1/3-(-1/4)=? Please solve and show me how you came to your conclusion. Thanks!

2007-06-08 18:38:48 · 7 answers · asked by Cat 1

2007-06-08 18:25:14 · 3 answers · asked by whatagowk 2

There are 2910 people each numbered from 1 to 2910 and sitting around a round table in clock-wise fashion.

(a) 29 people are selected randomly, what's the probability that no two of the persons selected are consecutive i.e. |num(i) -num(j)|=>2 where (i !=j) and i and j are among the 29 guys selected and num(i) is the number of the seat where (i) is sitting.

(b) while all were pondering over the part (a), suddenly the guy numbered 1 took his hidden pistol and shoot the guy next to him in anti clock wise fashion i.e. 2910 and gave the pistol to 2909. in turn

2909 shoots 2908 and this way this anti-clockwise killing goes on till the last guy remains alive.

1. Who is that last guy who survived?

2. Provide a detailed method clarifying each step and justifying any

assumption you took!

3. can you write a pseudo code or a real code which will take the

number (N) the number of ppl sitting around the round table as input argument and output the (S) the identification number of the guy who survived with the anti-clock-wise alternate killing.

4. It would be nice if you can have the robust test cases to test out

your code.

5. Plz clarify the Time complexity and the space complexity of your

code/algorithm used therein.

2007-06-08 18:17:47 · 6 answers · asked by meetme_nith 1

2007-06-08 17:52:19 · 12 answers · asked by Anonymous

if a chicken and a half lays an egg and a half in a day and a half... how many eggs will 3 chickens lay in 5 days?

2007-06-08 17:38:26 · 14 answers · asked by Amber 2

2007-06-08 16:13:50 · 13 answers · asked by Jamie 2

a. 2x+y+4=0
b. x-y+4=0
c. x-2y+7=0
d. 2x+y-8=0

2007-06-08 16:06:52 · 5 answers · asked by yaro l 1

[(1/7)(3x-2)]=(x+10)/5

..sorry for the poor notation
The answer is 10, but I don't know how to get to it.

2007-06-08 16:02:30 · 11 answers · asked by Princess 2