Mathematics - 5 August 2007

2007-08-05 14:41:11 · 3 answers · asked by d w 1

Customers's arrival rate is 1/2 per min. Find the probability that the 250th customer enters on the last hour of an 8-hr working day.

2007-08-05 14:29:53 · 1 answers · asked by kayedimanche 2

Ok, this is not really a question. I had to put the interrogative line so as to fulfill the pestering question mark which displays automatically at the end.

I had some good times here in YA mathematics, but now I finally feel what it really is: an out-of-school club for whining K12 kids massively poor at arithmetic, willing to have their trivial homeworks done without even the self-pride of trying by themselves. In this environment, only the quantity of answers counts. No real interest in the charm of a proof (and by the way, the point system is obviously too shallow to adequately represent one's efforts towards the beauty).

I'll get back to my cave keeping the fire of curiosity alive. I took from the library "a concise introduction to the theory of numbers" by Alan Baker. May I suggest you all take a good book and read it, to heck with YA!

Thank you for your attention at my long and uncalled-for rant. Goodbye and good luck with your studies.

2007-08-05 14:18:54 · 17 answers · asked by Anonymous

2007-08-05 14:05:04 · 6 answers · asked by Fullfigured_Kitten 1

After the 48 is the symbol for Pi. What does this mean?

2007-08-05 13:58:17 · 7 answers · asked by Meghan M 1

y-(1/8) = (-3/4) (x + 1/2)

2007-08-05 13:44:13 · 4 answers · asked by Juicy Baby 2

Determine and classify the extrema of
f(x)= 2x5 - 5x4

detrmine wether the critical point is a max. min . or inflection.

y= 3x3 - 9x - 5 x= -1
y= 2x3 - x5 x=0

p.s. the # to the right of the x are exponents

2007-08-05 13:35:19 · 4 answers · asked by Anonymous

what does y equal???


y-(1/8) = (3/4) (x + 1/2)

y-(1/8) = (-3/4) (x + 1/2)

2007-08-05 13:29:49 · 3 answers · asked by Jacob H 1

Two math problems I need help with first person to answer and show work get best answer. Thanks and good luck.

1. -x+3y=0
-5x+2y=-13

2007-08-05 13:26:33 · 4 answers · asked by MarinewithQuestion 5

At a video club, 3/4 of the members like to watch sports. Of the remaining members, 1/5 are men. What fraction of the club members are women who do not like to watch sports?

a) 1/20 b) 3/20 c) 1/5 d) 1/4 e) 4/5


Karen took a bus trip to visit her cousin. Her roundtrip travel time was 2.5 hours. If she averages 45 miles per hour, how many miles from her cousin's house does Karen live?

a) 36 b) 42 c) 45 d) 60 e) 75

explain or show work plz

2007-08-05 13:23:47 · 6 answers · asked by Anonymous

Although the weather was perfect for the beach party, 17 of the 30 people attending got a sunburn and 25 people were bitten by mosquitos. If 12 people, were both bitten and sunburned, how many had neither affliction?

2007-08-05 12:39:23 · 7 answers · asked by framling 1

Fill in the missing information in this Algebraic proof. Please label your answers as a, b, c, and d.

Angle W X Z and angle Z X Y are complementary. The measure of angle W X Y = left parentheses 3 times x + 3 right parentheses.

a.)The measure of angle __ = the measure of angle W X Z + the measure of angle Z X Y. (Angle Addition Postulate)

b.)The measure of angle W X Z + the measure of angle Z X Y = _. (Def. of Complementary Angles)

c.) The measure of angle W X Z is equal to _. (Transitive Prop. of Equality)

d.) ____ = 90 (Substitution)

e.) 3x = ____ (Subtraction Prop. of Equality)

f.) x = ____ (Division Prop. of Equality)

2007-08-05 12:38:34 · 5 answers · asked by Anonymous

State the domain of the following:
a) f(x)= √x+4 sqrt is over both
b) g(x)= (2x+1)/(x-3)
c) h(x)= 3x^2+5x-3
d) l(x)= 2x+3
e) m(x)= (3)/(x^2+7)

If someone could show me step by step how to get to the answer that would be great and thank you to anyone who helps.......

2007-08-05 12:19:18 · 7 answers · asked by Anonymous

eg.

3 = prime
5 = prime
8 = even

3 + 5 = 8

2007-08-05 11:55:49 · 8 answers · asked by Anonymous

What is the distance between A(-7, 3, 2) and B(1, 5, 1)?

1. 17
2. 11
3. Square root of 109
4. Square root of 69

And if you come in here and tell me to do my own work, you're getting reported for spamming.

2007-08-05 10:54:58 · 3 answers · asked by Anonymous

2007-08-05 10:50:23 · 3 answers · asked by noctoct25 2

Decimals dont count.

2007-08-05 10:45:18 · 7 answers · asked by threezero569 2

x+3y=10
&
y=x-2

2007-08-05 10:28:59 · 9 answers · asked by ititit3 2

How do I simplify:
(9x^2 - 4) (9x^4 - 6x^3 + 4x^2)
------------------- x --------------------------
(3x^2 - 5x + 2) (27x^4 + 8x)

2007-08-05 10:22:32 · 5 answers · asked by Anonymous

Which of the following is the greatest factor of the
equation: 18x³ + 4x² - 6xⁿ
ⁿ=4, couldn't figure out how to get a small superscript 4

A. 2x
B. x³
C. 2x²
D. 4x²
It says the answer is C...
Anyone know of any sites I could freshen up on my problems like this at?

2007-08-05 10:04:41 · 4 answers · asked by Chris 2

I'm doing one of those summer review packets...and I forgot how to solve this basic problem.

2007-08-05 09:59:30 · 6 answers · asked by mbtafan 3

2 questions

The population of a large herd of 6000 buffalo increases at a rate of 20% (.20) each year. In how many years will the population be nearly triple its present size?
a) 3 b) 4 c) 5 d) 6 e) 7

There are 2 specimens of a certain strain of bacteria in a special culture. These bacteria are known to triple in number ever 3 hours. How many will there be in the end of 24 hours?
a) 144 b) 216 c) 768 d) 13,122 e) 19,683

i dont know how to solve so plz explain or show work

2007-08-05 09:52:02 · 5 answers · asked by ? 2

How would you solve the following difficult problem below?

For the force field F(x,y,z)=(ze^x cos y) i - (ze^x sin y) j + (e^x cos y) k, calculate the work done by F on an object moving along a curve from (0, 0, 0) to (2, π/2, 1)


these were the possible answers given....

-2
-2 - 4e^2
0
-2e
-3e^2
-4e^2


I’ve gotten this far with it….
Px= z e^x cosy so P = z e^x cosy +f(y,z)
Py =- z e^xsin y so P = z e^x cos y +h(xz)
Pz = e^x cos y so P= z e^x cos y + g(x,y)
so
P= z e^x cos y is the potential function and the integral is

1*e^2*0- 0*1*1=0

Now how would you go about solving this….?

2007-08-05 09:43:40 · 2 answers · asked by Jake 1

Please show work. Thanks

2007-08-05 09:43:19 · 3 answers · asked by Tastytaint 1

2007-08-05 09:34:13 · 4 answers · asked by Anonymous

The value of the integral is pi/2.

This integral cannot be evaluated using the Fundamental Theorem of Calculus--at least, not in the way one might expect--because (sin x) / x does not have a nice-looking antiderivative.

I found one proof online using the Laplace transform, but I am wondering if there is another way (pehaps using a series, or the Fourier transform, or a contour in the complex plane, or inequalities, or some other technique.)

2007-08-05 09:29:46 · 3 answers · asked by Anonymous

For the force field F(x,y,z)=(ze^x cos y) i - (ze^x sin y) j + (e^x cos y) k, calculate the work done by F on an object moving along a curve from (0, 0, 0) to (2, π/2, 1)


these were the possible answers given....

-2
-2 - 4e^2
0
-2e
-3e^2
-4e^2


I’ve gotten this far with it….
Px= z e^x cosy so P = z e^x cosy +f(y,z)
Py =- z e^xsin y so P = z e^x cos y +h(xz)
Pz = e^x cos y so P= z e^x cos y + g(x,y)
so
P= z e^x cos y is the potential function and the integral is

1*e^2*0- 0*1*1=0

Now how would you go about solving this….?

2007-08-05 09:28:05 · 3 answers · asked by Doug 2

Solve For Θ

0 ≤ Θ < 360

2007-08-05 09:23:51 · 3 answers · asked by Bobby 1

6c^4 × 7c^6 my question is do you add or multipy the exponents is the answer 42c^10 or 42c^24 Thanks so much for all your help!

2007-08-05 09:07:10 · 4 answers · asked by Anonymous

Write an equation to describe the variation. Use k for the constant of proportionality.
a varies inversely as s^4




Problem 2


Solve the proportion.

(1) / (w + 10 ) = ( 3) / (5w )

2007-08-05 08:54:01 · 4 answers · asked by Anonymous