Mathematics - 19 October 2007

The problem is 45y -7.8 = 15y + 7.2

Please show me the steps to solve the equation. I'm a little rusty.

2007-10-19 08:32:34 · 4 answers · asked by Dancer3d 4

We have to have:
supply list (actually we have to provide the supplies)
Object of the game (how do you know who wins)
Rules for playing and scoring
step by step directions of how to play
Description of "sample space and sample size" ?????
Discussion of how the game is fair......include the probability for each player to win.

Any ideas????

2007-10-19 08:31:53 · 1 answers · asked by adnerb 4

What is the derivative of 2^x ? Please explain

2007-10-19 08:30:54 · 13 answers · asked by Anonymous

Please help me solve this integration problem 1/ (3sinx + 4cosx) dx

Please try not to use arc we havent got there yet

I started this problem by multiplying with the conjugate.. but i am stuck/ or made it worse lol

Please explain how you got your answer!

Thanks so much,

2007-10-19 08:21:00 · 4 answers · asked by Sarah 2

I have spent an hour trying to do this... please help.

Note: ^ means to the power of

f:x --> e^(1-x^2)

The minimum values of f(x), as x varies between 0 and 2, are m and M respectively.

Show that M-m = 2.67





So far i have differentiatied f:x to give me -2xe^1-x^2
dy/dx must = 0 fo a stationary points and so i know that when x = 0 there is a stationary point, but where is the other??

2007-10-19 08:17:37 · 3 answers · asked by C4 Snake 3

2007-10-19 08:13:26 · 13 answers · asked by Ivan Zell 1

4/x - 3/y = 8
5/x - 8/y = 13

I usually excel in math. I understand systems but I didn't understand how to solve this one. I just want to understand the process by which to do this, so help and explanation will be extremely appreciated.

2007-10-19 08:13:05 · 7 answers · asked by Anonymous

The number of yeast cells in a laboratory culture increases rapidly at first but levels off eventually. The population is modeled by the function below, where t is measured in hours. At time t = 0 the population is 30 cells and is increasing at a rate of 21 cells/hour.

n = f(t) = a / 1+be^-0.8t

a) Find values for "a" and "b"
b) According to this model, in the long run the yeast population stabilizes at ______ cells.

2007-10-19 08:09:04 · 4 answers · asked by Mike O 1

Let V be a vector space, V X V the product vector space and Z = {(x,x): xeV}. called the diagonal of VXV . Prove that Z is a linear subspace of V X V and that (VXV) / Z is isomorphic to V

your help is appreciated

2007-10-19 08:07:29 · 4 answers · asked by Anonymous

A rectangle has a width that is 2 more than three times the lenght. The perimeter measures 92 units.

2007-10-19 08:06:17 · 8 answers · asked by davidiscool@sbcglobal.net 2

2007-10-19 07:58:08 · 10 answers · asked by tankwillmsg 1

1. |a| + 6 = 9

A) a = 3 or a = -3

B) a = 3 or a = -15

C) a = 3 or a = 15

D) a = -3 or a = 15

2. |2x + 3| = 7

A) x = 4 or x = 10

B) x = 4 or x = -10

C) x = 2 or x = 5

D) x = 2 or x = -5

2007-10-19 07:43:08 · 3 answers · asked by ketch 1

3 consecutive even integers are so that the sum of the 2 larger integers is 232 more than 3 times the smallest integer.

2007-10-19 07:38:15 · 3 answers · asked by crystalie t 1

A semicircle with diameter PQ sits on an isosceles triangle PQR to form a region shaped like a two-dimensional ice cream cone. If A(theta) is the area of the semicircle and B(theta) is the area of the triangle, find: limit, as theta approaches 0 from the right, of A(theta)/B(theta). Sides of the triangle: side PR=10 cm, side QR=10 cm and side PQ forms the bottom of the semicircle. The angle of the bottom of the cone (corner R) is equal to theta.


(this problem is sooo confusing. i will give best answer to the first person to solve it. Thanks!)

2007-10-19 07:35:59 · 3 answers · asked by jeremy s 2

2007-10-19 07:29:28 · 13 answers · asked by afields3 1

this is a derivatve question

2007-10-19 07:26:16 · 1 answers · asked by donpierro 1

2007-10-19 07:20:58 · 5 answers · asked by bibobum 2

show the work

2007-10-19 07:08:00 · 5 answers · asked by Shawty 1

1.cos(inverse)(1-2IxI)/3) + log(base)Ix-1I x where I I represents modulus function.
2. sqrt(sin(inverse)(3x-4x^3)) +sqrt(cos(inverse)x)
3.Find period of sin((piex)/(n-1)!)+ cos((piex)/(n!))

2007-10-19 06:57:41 · 2 answers · asked by Anonymous

2007-10-19 06:56:32 · 5 answers · asked by oliver 1

2007-10-19 06:50:49 · 6 answers · asked by lilmamachula509 1

∫∫ xye^(-x^(2)*y) R= {(x,y,) : 0 <= x <= 1 , 0 <= y <= 2}

I'm gettting - (1+e^2)/e^2

Please help.

2007-10-19 06:49:23 · 3 answers · asked by beer drinkers 2

Finf all critical points and classify as local max/min/saddle:

f(x,y) =x^3 + xy - y^3.

I got:

f(0,0) = 0 ; saddle
f(1,-3) = 25 ; local min
f(3,1) = 29 ; saddle

am I missing any?

2007-10-19 06:34:48 · 5 answers · asked by beer drinkers 2

2007-10-19 06:29:33 · 8 answers · asked by DEIANARA D 1

I'm learning about imaginary numbers in Algebra II right now, and I'm thinking, what's the point? If the numbers are imaginary and don't really exist, then why must we learn about them? When would we ever have to use these kinds of numbers in life, like in a job or career of some sort, if they're imaginary and don't exist?

2007-10-19 06:28:19 · 10 answers · asked by Anonymous

"Cost $0.79 a pound, cashews $2.49 and pound, and walnuts $1.89 a pound. A store clerk needs to make 2 pounds of mixed nuts using these three types so the total cost is $2.97. If she wants to use 3 times as much peanuts as cashews, find how much of each type of nut she should use?"

2007-10-19 06:27:29 · 2 answers · asked by Anonymous

figure it out

2007-10-19 06:26:47 · 3 answers · asked by Anonymous

I am supposed to subtract 6 from 15 but I only have 10 fingers. Can I borrow someones hand? I only need one.

2007-10-19 06:14:53 · 13 answers · asked by Anonymous

y = x^2 * sinh^-1(5x)
y' = ?
I come up with (2x)(sinh^-1(5x) + (5x^2) / (1+(5x)^2)^(1/2)

But i Keep getting a wrong input can someone please help?
I may need to simplify but not shure how

2007-10-19 06:08:39 · 3 answers · asked by Smokey. 6

34, 38, and 39. You cannot combine numbers like 12+34=36. Each number is used by itself. I figured out all 1-40, except these 3. Thanks. Can only use +, - , *, and /.

2007-10-19 06:04:15 · 5 answers · asked by Anonymous