Mathematics - 28 October 2007

2007-10-28 14:34:24 · 5 answers · asked by HP2007 1

2007-10-28 14:30:54 · 7 answers · asked by Anonymous

Solve for x: ( | indicates absolute value)

| x^2 - 2x | = 3x - 6

2007-10-28 14:30:52 · 4 answers · asked by skinzzfan25 1

2007-10-28 14:23:20 · 4 answers · asked by Barbiex) 1

i have a 100pt chpter test tommorow and i no how to do this but my dad dosent think its right and my sister is saying its weird please help to clear it

simplify this equation
-7a+3(a-c)+5c

2007-10-28 14:20:07 · 7 answers · asked by Anonymous

a. 15 and 15
b. 11 and 19
c. 7 and 23
d. 13 and 17

2007-10-28 14:11:56 · 6 answers · asked by Anonymous

Use implicit differentiation to find the slope tangent line to the curve (x^3y^4)+(10y^5)= (x^5) + 335 at the point (1,2).

The Slope M = ?

I keep getting -75/816, and it's wrong. Can anyone help?

2007-10-28 14:11:19 · 4 answers · asked by tazzerz 1

Evaluate and compare delta y and dy.

y = 2x^2+1, x = 2, delta x = dx = 0.01

2007-10-28 14:10:09 · 1 answers · asked by topherpark67 1

3 to the power of x+2 equals 7 to the power of 2x plus 5

2007-10-28 14:04:23 · 5 answers · asked by Best S 1

Ok I'm having my GCE O levels examination in like 5 hours, so reaaaally need help on this question.

The force of attraction between two magnets if F Newtons. This force is inversely proportional to the square of the distance, D centimetres, between the magnets.

When the magnets are a certain distance apart, the forcce is 10 Newtons. What is the force when this distance is doubled?

2007-10-28 13:57:57 · 1 answers · asked by sarahajane 2

I understand how to solve simpler ones. But i dont get what top do when i have squared terms.

3x²-y²=9
x²+2y²=10

x²+y²=25
9y=4x²

how do i solve these?

(to make a square, press ALT + 0178)

2007-10-28 13:46:41 · 6 answers · asked by Anonymous

f(x) = 2x^2 - 7x + 2

2007-10-28 13:44:11 · 6 answers · asked by Epic M 1

I was going over a practice SAT exam and I saw a problem involving x∆y, and I've never seen this before. Anyone familiar with what that means? The problem is x∆y = x^2 +xy +y^2, what is the value of (3∆1)∆1..

Someone was telling me that ∆ was the equivalent of ^, but if that was the case to get the y out of the exponent you'd have to take the natural log of both sides..

Any help much appreciated

2007-10-28 13:28:05 · 3 answers · asked by armagedon472 2

Show that this series converges to ln(2). Consider the n-th Taylor Polynomial for ln(x) at x=1 and the corresponding term

∞
∑ ((-1)^(n+1))*(1/n)
n=0

I have absolutely no idea how to do this, can anyone help me plz!?!?!?!

2007-10-28 13:27:58 · 4 answers · asked by Anonymous

a. 2880
b. 2520
c. 2700
d. 3240

2007-10-28 13:20:27 · 2 answers · asked by Anonymous

2007-10-28 13:13:52 · 5 answers · asked by lovebird 3

8(f+3)=10f-32 anyone know

2007-10-28 13:11:53 · 18 answers · asked by Jasmine J 1

Been given some maths homework and it asks the questions:

Find the constants of a and b such that, for all values of x,
x^2 + 4x + 14 = (x + a)^2 + b

and

You are given that f(x) = x^3 - 7x + 6
1 Show that (x-2) is a factor of f(x)
2 Solve the equation f(x) = 0

I have no idea how to do these and I would really appreciate if someone could possibly post a walkthrough to the solution or just a walkthrough so I can attempt it myself, either one's good.

Thanks :)

2007-10-28 13:08:23 · 1 answers · asked by Alex P 2

When is it beneficial to work with angles measured in radians/ degrees?

2007-10-28 13:06:04 · 2 answers · asked by Anonymous

solving for simplified radical answer

(4/3x)-(3/x^2) = (1/5)

2007-10-28 13:04:29 · 3 answers · asked by phresh 1

At present 40 apple trees are planted per acre and the average yield is 20 bushels per tree. Suppose the experienced grower estimates that for every 5 new trees added per acre, the yield will decrease by 2 bushels per tree. One is interested in how many trees should be planted per harvest.

Let x=trees per acre added
Let H(x)=bushels of apples per acre.


I know that there should be 45 trees/acre for the max bushels, but how do I get the equation? Any help would be appreciated.

2007-10-28 13:01:59 · 3 answers · asked by Liz 4

The squares of a nxn checkerboard are to be colored with m colors.
Two colorings are said to be equivalent of one can be transformed into
the other by a rigid motion of the checkerboard in 2 dimensions
(no flips).How many colorings are there?
Can you explain how you got that answer? Additionally, the question says to consider the cases for n even and n odd.. but there is no other information. I don't think it has anything to do with the equivalence classes.

2007-10-28 13:00:26 · 1 answers · asked by Anthony M 1

Hello -

I'm trying to figure out the bounds for the following integral.

Triple Integral xy dV, where E is the solid tetrahedron with vertices (0,0,0), (1,0,0), (0,2,0), (0,0,3).

Please help. Thank you.

2007-10-28 12:59:36 · 2 answers · asked by Anonymous

my teacher says its possible but i have no clue how
help is needed
best answer guaranteed

2007-10-28 12:52:34 · 3 answers · asked by T O 3

If a store's sales are $55,000 a month and it had a constant increase of 2% in sales each month, how long... would it take for the monthly sales to increase to $85,000? If you can please provide the formula to this question with simple steps that is easily understandable, it would be appreciated.

2007-10-28 12:50:37 · 4 answers · asked by pizzandgrill 2

Please help.... I think I am looking into to much and cant figure out the answer....

2007-10-28 12:44:26 · 4 answers · asked by Anonymous

FIND THE LENGTH OF THE RADIUS

a. 40in
b. 41in
c. 44 in
d. 58in

2007-10-28 12:43:32 · 2 answers · asked by Yomi T 1

Solve. –3(10x – 3) + 10(3x – 3) = x – 7

2007-10-28 12:42:39 · 1 answers · asked by Anonymous

3f(x) + f(2-x) = x^2

What is f(x)?

2007-10-28 12:42:19 · 2 answers · asked by Anonymous

A circle of radius is dropped into the parabola . If too large, the circle will not fall all the way to the bottom, if is sufficiently small, the circle will touch the parabola at its vertex. Find the largest value of r so that the circle will touch the vertex of the parabola

2007-10-28 12:38:15 · 2 answers · asked by edima 1