Mathematics - 30 October 2007

find the difference quotient of:
f(x)=-7x^2+9x-6


please show all work so I can start to understand this!!!!
:)

2007-10-30 06:18:18 · 3 answers · asked by Ayy Girl! 1

2007-10-30 06:16:59 · 3 answers · asked by JACKIE 3

4x^2 + 10x + 3 = 0

x^2 = 3 - 4x

-4x^2 - 3x - 1 = 0

(3x + 5)^2 = 100

I know I'm suppose to use the quadratic formula for the first one (which I did, but I came up with a different answer than the choices given) but I don't know how to work the others. HELP!

2007-10-30 06:09:51 · 4 answers · asked by starscream 1

ok i forgot how to these problems p(10,3)

&& i jus need sumone to work it out so i can see how u do it again thanxs
thiis would help out alot cuz i got homework on this
thanxs.

2007-10-30 06:05:21 · 1 answers · asked by cutejaz18 1

2007-10-30 05:59:32 · 2 answers · asked by Erica 1

Highway partol: A highwasy partol plane flies 3 mi above a level, straight road at a a steady 120 mi/h. the pilot sees an oncoming car and with radar determines that at teh instant the line of sight distance from ot car is 5mi, the-line-of-sight distance is decreasing at the rate of 160mi/h. find the car's speed along the highwasy.

2. The diameter of a tree was 10 in. during the following year, the circumference increased 2 in. abour how much did the tree's diameter increased? The tree's cross- section area?
my answer: it 6.28 in is this right please let me know. i don;t know how to find the trees cross section.

please help me i tried so many ways to solve these problem!

2007-10-30 05:56:57 · 1 answers · asked by Facilitate 1

2007-10-30 05:53:54 · 3 answers · asked by dwltpa 1

2007-10-30 05:52:46 · 2 answers · asked by raymysterio_91 1

Showing the statement below seems to be a cute problem (f^k denotes the k-th derivative of f). I don't have the proof yet, but I was assured by a top dog that the statement is true.

Suppose that, for some positive integer n, the function f: R->R is (n +1) times differentiable and that both f and f^(n+1) are bounded on R. Then, for every k=1,2,3.... , f^k is bounded on R

2007-10-30 05:49:58 · 2 answers · asked by Steiner 7

2007-10-30 05:48:43 · 8 answers · asked by brutalhonesty 2

A particle is moving along the curve y = x^(1/2). As the particle passes through the point (4,2), its x-coordinate increases at a rate of 3 cm/s. How fast is the distance from the particle of the origin changing at this instant?

Can someone show me how to figure this out?

2007-10-30 05:47:34 · 1 answers · asked by the Jam 2

how do i solve for x

3x (x+2)(x-2)=0

how do i divide this equation.
(3x – 2)(x - 4) – (x - 4)(6 – 5x) / (4 – x)(8x – 1)

2007-10-30 05:40:19 · 5 answers · asked by Anonymous

2007-10-30 05:38:23 · 2 answers · asked by Ben 1

Country : Cuba
Population is : 11, 394,043
Growth Rate: 0.273%

Use the growth rate to approximate the population in the year 2008. Show how each of the approximations were made by including your calculations.

Example: The population of India in 2005 was 1,080,264,388. The growth rate is 1.4%
In 2006 , the approximate population is 1,095,388,089.
" 2007 is 1,110,723,523
" 2008 is 1,126,273,652

2007-10-30 05:38:07 · 2 answers · asked by yuleydis77 1

Let alpha and beta be two angles in a right triangle (niether alpha and beta is the right angle. Is it possible to have alpha + Beta(7)= 30degrees? Can you explain it to me, beta is multiplied by seven if it not clear.

2007-10-30 05:33:06 · 5 answers · asked by Anonymous

1m cubed of a field gets about 1050Mj of light energy per year.

only 21 500kJ of energy is stored in the new grass.

(i) How is the energy stored in the new grass?

...............................................................................

(ii) What is the % of light energy stored in the grass?

...........................................................................................................................................................................

2007-10-30 05:29:34 · 6 answers · asked by Nat 1

This problem is, in my opinion, interesting.

Let (a_n) be a nonincreasing sequence of nonnegative numbers such that sum(a_k, k=1..+oo) <+oo. Let S denote the set of all numbers which are sums of subseries of sum(a_k,k=1..+oo). Prove that S is an interval if, and only if, for each natural n, a_n <= sum(a_k,k=n+1..+oo).

2007-10-30 05:18:18 · 3 answers · asked by Steiner 7

please kindly help me....any method can be used.....i just dont get the right answer...please help me....

1.(3x-2y+1)dx+(3x-2y+3)dy=0
ans. 5(x+y+c)=2 ln(15x-10y+11)

2.dy/dx =(9x+4y+1)^2
ans. 3 tan(6x+c)=2(9x+4y+1)

3.(3siny-5x)dx+2x^2cotydy=0
ans. x^3(sin y-x)^2=2y+c

4.(x^2+6y^2)dx-4xydy=0,x=1,y=1
ans.2y^2=x^2(3x-1)


please help me....thank you very much !

2007-10-30 05:10:56 · 1 answers · asked by ice_cream_chico 1

Simplify M^2/3 divided by M^1/5

The square root of (2x+4) +1 is greater than or equal to 5
****square root bar is only over 2x+4****

2007-10-30 05:06:59 · 6 answers · asked by ehrlich 6

this is to find slope and what not needed for tomorro including others

2007-10-30 05:05:17 · 2 answers · asked by charlie 1

your told f(x)= 2x/3-5 g(x)=x/2+3

now am told to find for these ones:
(a) fg(x)
(b) gf(10)
(c) gf(x)

2007-10-30 05:04:07 · 2 answers · asked by Anonymous

What is the equation of the function, g(x),
and

Modify y=f(x)=x^2(-8)

2007-10-30 04:55:13 · 2 answers · asked by yuleydis77 1

Evaluate the numerical terms. {2 X} exponent of -2 / {3X} exponent of -1. The answer should look something like this in this form 4/ 2x+3 or something. The answer should be in the same form as the question.

2007-10-30 04:50:27 · 2 answers · asked by ilovedstny 1

2007-10-30 04:44:15 · 5 answers · asked by vishal p 2

It is true that Q(x)=x^5+x^3+x is a one to one function whose domain and range are all numbers.

Suppose that R is the function inverse to Q, There is no simpe algebraic way to compute values of R. compute R(3), R'(3), and R''(3).

Ok so I found the inverse but what do I do from here?

There's a hint and it says Q(R(x))=x and R(Q(x))=x. So fund an input to Q which will "output" 3. Then differentiate one of the equations, maybe more than once.

I'm really confused about what to do. If someone could explain I'd greatly appreciate it! Thanks.

2007-10-30 04:42:03 · 2 answers · asked by Anonymous

Is this an example of scientific notation: 16.93 x 10 ?
If not, rewrite in scientific notation.

2007-10-30 04:39:32 · 4 answers · asked by tuntuni11 1

What does the absolute value mean and can it ever be a negative number?

2007-10-30 04:38:24 · 6 answers · asked by tuntuni11 1

There are 10 light bulbs in a box.
You need 4 of them.
How many different combinations of 4 light bulbs are possible?

2007-10-30 04:36:34 · 13 answers · asked by Randy C 2

How would I "extract" this?

(r+6)^2 = 13

2007-10-30 04:32:06 · 2 answers · asked by Anonymous

For t:R--R,f(X)=e^x- x/e
find the coordinates of the turning point of the graph of y=f(x)


&


State the maximum domain for the function with rule f(x)=2log(e) (x-3)

(The e on the above question 2log(e) is small and below the log)

2007-10-30 04:30:27 · 2 answers · asked by Dom, G 2