Mathematics - 13 November 2007

Find the sum of the series if |7x| < 1.
1 - (7x) + (7x)^2 - (7x)^3 + (7x)^4 +....
Find the sum of the series if |7y| < 1.
1 - (7y)^2 + (7y)^4 - (7y)^6 + .....

2007-11-13 06:30:38 · 2 answers · asked by simonkf2002 1

Is
(x power y) power z = x power yz
only true if
x >= 0
?

Please explain why.

2007-11-13 06:07:42 · 4 answers · asked by E. Divin 2

What must the amount of his sales be for him to earn at least $1500 each month? (Let s = the amount of Jordan's sales)

2007-11-13 05:57:07 · 5 answers · asked by Alley 1

Okay, it says: Find the unite vectors u = (cos X)i + (sin X)j in the same direction as:

1. -i + 3j

2. 6i - 8j

I have no idea what that means, as I have never dealt with a problem like that before. I have no idea even where to begin because I do not know what it is asking me to do!! Can someone please help me figure this out?! Thank you so much and I'll pick a best answer TODAY!!!!!!!!!!!!!!!!!!!!!!

2007-11-13 05:54:35 · 5 answers · asked by James J 2

given the 2 x 2 matrix - A

( 0.9 0.05 )
( 0.1 0.95 )

please help me find A ^ (n ) where n is a positive integer

the intial condition is:
( v ) = 300
( r ) 100

please help me, I'm really lost

2007-11-13 05:53:28 · 1 answers · asked by phil h 2

I have a circle with points D &E making a 50 degree angle meeting at point D which is the midpoint of the circle. So line CD & CE are equal to the radius of the circle. Now I also have point A which is directly located between points D &E at the opposite side of the circle. I need to find what is the angle DAE???

2007-11-13 05:51:29 · 3 answers · asked by Anonymous

let X have pdf f(x)=4x^3, 0
the answer in the back is g(y)= 2y, 0
im not sure how they got this answer, thanks

2007-11-13 05:46:09 · 3 answers · asked by Anonymous

Please help to EXPLAIN (not just give answers), how to find each answer to the questions below...THANKS!
This is in accounting class, but I think math might work better
-------------

Al is considering opening a gift shop. He has collected the following information:

Monthly rent: $2,800
Monthly sales salaries: $1,200
In addition to the sales salaries, Al intends to pay a 5% sales commission to his sales staff.
The cost of merchandise sold is expected to be 40% of sales.

1. Determine Al's break-even point (BEP) in monthly sales dollars.
2. Determine the monthly sales dollars required to earn $2000 profit per month.
3. Determine Al's BEP if he reduces rent by $200/month.

----
For 4,5, and 6, assume:
*He's reduced his merchadise purchase cost by 10%.
*This will not effect the sale price of her product.
----

4. Determine the new Contribution Margin Ratio.
5. What's the new BEP in monthly sales dollars?
6. What's the new sales amount needed for $2,000 profit?

2007-11-13 05:39:06 · 3 answers · asked by mikeburman11 1

I have to use a graphing calculator to do fnInt ( ______________, ______, _______, _______ ) = ___________.

Problem is, I have no idea what to do or where to start.

2007-11-13 05:28:54 · 1 answers · asked by Anonymous

2007-11-13 05:28:44 · 1 answers · asked by worldoomedwogod@sbcglobal.net 1

18+70=88

2007-11-13 05:21:26 · 2 answers · asked by Anonymous

What exactly is the formula for figuring out what grade is needed on the final to get a certain grade?

2007-11-13 05:08:45 · 5 answers · asked by Starr W 2

If you can, please give me step by step. Those who know ofcourse. Points to the right answer!

1. (7a^3b/3ab^5)/(21a^4b^2/14a^3b) = ?

and

2. (4y/3x)+(15x^2/2y) = ?

2007-11-13 05:04:32 · 5 answers · asked by grfisgd 6

I forgot to mention, both cars are traveling in the same direction. I did very well in Algebra (20 years ago), I just can't remember for the life of me how to set this up. I appreciate anyone's time!!!!!

2007-11-13 04:51:39 · 9 answers · asked by Jeff 1

how many revolutions will hour hand make with respect to stars in one day?

Lets ignore small difference between siderial day and solar day.

2007-11-13 04:44:57 · 3 answers · asked by Alexander 6

http://i118.photobucket.com/albums/o117/Hannahrae2011/untitled-13.jpg

I dn't understand these at all

2007-11-13 04:08:20 · 1 answers · asked by Anonymous

I've posted my question in detail at Cramster.com:

http://answerboard.cramster.com/math-topic-5-140229-0.aspx

I got stuck about halfway through the proof. Any help is greatly appreciated. Thanks!

2007-11-13 04:07:24 · 2 answers · asked by PuzzledStudent 2

There are 3 parts to the question please help with as much as you can thanks!
a) Find the area that is inside r = 4sin feda and outside r = 2
b) Find the length of r = 4sin feda and when pie/4 < = Pie < = 3 pie /4 ( < = is smaller than and equal to ).
c) Find the line tangent to r = 4sin Feda at the point where Feda = Pie/6

2007-11-13 03:37:12 · 1 answers · asked by Anonymous

its math..

2007-11-13 03:25:10 · 5 answers · asked by Anonymous

More than likely I have fallen way behind in my pre-cal class and I don't know what sin x or cos x is in terms of tan x. I read up everything in the book and nothing is addressed for tan x, so I guess the book doesn't tell you everything. I guess I have to actually go to a tutor for the first time in my life... sux.

2007-11-13 03:09:46 · 6 answers · asked by waznnathan 3

Alright, I'm having some trouble figuring out these slopes...

My first question is, would 7x + 6(x + 5y) = 6x + y be linear? If so, how would I right it in standard form?

My second question is, what is the slope that passes through (-1, -1) and (10,9)?

2007-11-13 03:02:25 · 3 answers · asked by Anonymous

Consider the equilateral triangle with vertices at (-1,0),(1,0),(0,sqrt(3)).(This triangle has area sqrt(3).Describe the rectangle with largest area that can be inscribed in the equilateral triangle. What fraction of the triangle's area does this rectangle occupy?

2007-11-13 03:02:05 · 1 answers · asked by Matty B 3

2007-11-13 03:01:27 · 6 answers · asked by Anonymous

In isosceles PQR, P is the vertex angle. If mQ = 8x - 3 and mR = 2x + 15, find the measure of P.

3
21
42
138

please help me i reallly dont know which one it is. lol i have been working on this problem for lke 20 minutess

please and thanks<3

2007-11-13 02:45:56 · 2 answers · asked by Dianalynn 1

a.) Graph: y=x2-3x+2
b.) Vertex:
c.) Axis of symmetry

2007-11-13 02:39:57 · 3 answers · asked by courtney f 1

2007-11-13 02:27:02 · 3 answers · asked by courtney f 1

Suppose f(x) is continuous in [a,b] and let
z = (1/2) (f(x1)) + (f(x2))

where x1,x2 "element" [a, b] . Show that there exists a point c "element" [a, b] such that f(c) = z

2007-11-13 02:26:51 · 1 answers · asked by We are Venom! 1

2007-11-13 02:23:19 · 8 answers · asked by Boogie 2

http://i118.photobucket.com/albums/o117/Hannahrae2011/untitled-13.jpg

2007-11-13 02:11:33 · 1 answers · asked by Anonymous

2007-11-13 01:54:52 · 3 answers · asked by md_free23 1