Mathematics - 28 December 2007

1.x^2+xy^2-5=0
Find the value of dy/dx at the point (1,2)

2. Also i had trouble integrating (x+3)/x^2

thanks very much for any help.

2007-12-28 23:59:23 · 3 answers · asked by Anonymous

2007-12-28 22:56:03 · 6 answers · asked by question legend 2

Any help and steps in solving this would be appreciated!! Thanks!!!


The total cost in dollars for a certain company to produce x empty jars to be used by a jelly
producer is given by the function C(x) = 0.2x + 30,000. Find C(80,000) the cost of producing
80,000 jars.

2007-12-28 22:31:59 · 7 answers · asked by Anonymous

please tell me,how to find
1.local max
2.local min
3.absolute max
4.ab min

2007-12-28 22:19:37 · 3 answers · asked by Anonymous

http://www.free-picture-host.com/viewimage.php?file=/images/FVUWcj1198925619.jpg
(nid urgent help can't do it)

2007-12-28 22:07:52 · 3 answers · asked by Stormy Knight 1

2007-12-28 21:52:42 · 7 answers · asked by Chris 3

Im a C1 A level student, but I just cant get my hang around it!!!

Please do both of these qus: (just copy and paste the ² symbol from here for your answer).

1) 2x² + 3x -5

2) -x² +6x +9

Especially for the first one, please show EVERY single step.

Thank you vvvvv much for your help =D
Early Happy New Year!!!

2007-12-28 21:01:21 · 9 answers · asked by ღ♥ღ latoya 4

e^x - 3x^2 = 0

Solve for x.

(I know the answer, but am stuck on how to get there algebraically rather than graphically.)

Thanks!

2007-12-28 20:51:13 · 6 answers · asked by McMurphyRP 3

Solve these applications:

9% sales tax on one 50 inch television that costs $940 What is the sales tax?

20% discount on one VCR that costs $104 Sales tax is 7% How much is the after-tax total?


60% discount on one Cordless Phone that costs $62 What is the discount?

You want to buy the Laptop Computer for $1,955 and also the VCR for $104. If the sales tax is 9.5%, what is your after-tax total?


Find each percent of increase or decrease. Round your answer to the nearest tenth of a percent.

95 is increased to 513


300 is increased to 372


30 is decreased to 15


47 is decreased to 41.83



thnx

2007-12-28 19:51:44 · 5 answers · asked by Anonymous

it with the amount of hair your sister has and you kept multiplying this with the people (let's say in your church or an organization), approximately what would be your answer?

2007-12-28 19:44:10 · 7 answers · asked by Mike Hunt 2

Hi.. I'm really not understanding how to complete the square (especially when there are negatives). This is an A Level C1 past exam qu, and I really have no idea how to do it. I only presume that I need to use completing the square, but another method would be fine.

Please show your full method:

f(x) = 9 +6x -x^2

i) Find the values of A and B such that
f(x) = A - (x+B)^2

ii) State the maximum value of f(x)


Thank you vv much =D

2007-12-28 19:37:42 · 7 answers · asked by ღ♥ღ latoya 4

If cos^2 θ = (m^2 - 1)/3 and tan^3 (θ/2) = tan α,
then prove that sin^(2/3) α + cos^(2/3) α = (2/m)^(2/3)

2007-12-28 19:23:23 · 1 answers · asked by Madhukar 7

2007-12-28 19:17:06 · 15 answers · asked by shanda L 1

At the race track, one spectator watched a number of cars whirling around the circular track and said, " Ther'es Joe, that man in the white car!" " Yes I see." was the reply, "but how many cars are running in this race?" Someone replied. " one-third of the cars are in front of Joe added to three quarters behind him will give you the answers." how many cars were being driven in the race?

2007-12-28 19:13:16 · 3 answers · asked by Anonymous

whats this #? (in numbers)

XXXVII


10x!

2007-12-28 19:13:06 · 12 answers · asked by Anonymous

2007-12-28 19:11:44 · 3 answers · asked by mathstudent 2

2007-12-28 18:58:12 · 4 answers · asked by mathstudent 2

hello. is there a standard form for a radioactive decay MATH problem?

for example, 226Ra has half life of 1620 yrs. what percent will remain after 100yrs?

thanks for your help

2007-12-28 18:56:27 · 4 answers · asked by Anonymous

2007-12-28 18:52:48 · 5 answers · asked by mathstudent 2

please let me know soon

2007-12-28 17:54:33 · 9 answers · asked by AASTHA Lahiri 1

what does "(h,k) has the form (a, a+1) since it's on the line y = x + 1" mean?

2007-12-28 17:52:00 · 6 answers · asked by Silver L 1

2007-12-28 17:43:36 · 6 answers · asked by UnknownD 6

I am trying to work out a calc problem and am stuck at solving for x. Right now I have
0=2cosx+2cos(2x)

I need to know what value for x results in 0; please explain how to do this.

2007-12-28 17:40:23 · 4 answers · asked by belizeable 4

Can u help 4 my project??????

2007-12-28 17:39:25 · 5 answers · asked by abhi 1

If i roll a die 6 times what r the chances i git one six? i knoe if u roll a doe once the chances of getting 6 is 1/6. And if u roll it 3 times the chances of gettin 6 are 3/6=1/2, rite? But if u roll it 6 times it ain't guaranteed u git a six, so what is the chances u get a 6 if u roll it 6 times?

2007-12-28 17:16:38 · 9 answers · asked by Charlie Brown 2

1.In a standard deck of 52 cards,13 of the cards are diamonds.If two cards are drawn randomly without replacement, what is the probabilty that both cards are diamonds?

2.If the average of a and -5 is 10, whatis the value of a

3.find the sum of the measures of the interior angles of an octagon

2007-12-28 16:28:41 · 6 answers · asked by Anonymous

hey people i need more math help please help me again
if you want another ten points cause maybe on the last problem you helped me with ill pick you as best answer and if you give me a good enough answer on this question i might choose you as best answer also then you would have 20 points total but yeah please help me thanks

5=s/-7
9 p/-2<-5

2007-12-28 16:02:31 · 9 answers · asked by Serena Van der Woodsen 2

2.) What percent of 76 is 15.2?
3.) 138 is 75% of what number?

lmfaoo thanks
I said that the last question would be my last one
but this is seriously my last one
since these are the last problems :D

2007-12-28 15:45:33 · 14 answers · asked by ahhitsjenny 2

PLEASE HELP me with these math problems if you want ten points of course :)

5x + 28 = 153
3(2r - 5) + 8(r + 2)
w ? (-2) = 14
Fencing Thirty-six sections of fencing,
all the same length, are joined to form
a fence 180 m long. How long is each
section of fencing?

How are the rules for
solving inequalities similar to those for
solving equations? How are they different?
y - 6 , 9

ok thats all the questions sorry there so long but please please help me Im desperete

2007-12-28 15:28:15 · 7 answers · asked by Serena Van der Woodsen 2

2,3,5,7,11....are examples of prome numbers. Each number has only itself and 1 as factors. Suppose the number of units in eatch the length and widith of a rectangle are prime numbers and tehe perimiter is 36 units. What is the largest number of square units a number could have?

2007-12-28 15:27:50 · 5 answers · asked by GF 1