Mathematics - 6 November 2007

step-by-step please...

2007-11-06 04:28:48 · 9 answers · asked by Anonymous

1)Solve the equation.

(1/9)^x-3 = 27^2x-1

2007-11-06 04:25:26 · 4 answers · asked by Anonymous

How is this done?

2007-11-06 04:23:31 · 1 answers · asked by RogerDodger 1

2007-11-06 04:14:03 · 2 answers · asked by cutiepie1334 1

* USE DOUBLE ANGLE FORMULA
* answer in the book = 1

2007-11-06 04:07:42 · 1 answers · asked by cutiepie1334 1

So I have to create exercises like : 33 : x = 4 and we add 1 the answer we find like : 33 -1 :4=32:4=8 .please fast crate problems

2007-11-06 03:58:35 · 3 answers · asked by Francesca 1

2007-11-06 03:52:37 · 8 answers · asked by gamegod201 2

Find the angle theta that maximizes the area of isosceles triangle with legs l.

It shows triangle with two legs l and the theta between those two legs.

I know I have Area=1/2B*h
And I know I can split the triangle to make a statement about theta/2 but I'm stuck on how to do all this.....please help!

2007-11-06 03:41:57 · 4 answers · asked by Anonymous

Hi! FYI I am doing all my homework myself but I am stuck on these three questions.
1. -136 - 18.95
2. -17.435 + 11.8
3. 9.28 - ( - 9.2 )

I am bad at doing negative, can you show me a easier way I can do it?

2007-11-06 03:36:24 · 6 answers · asked by Anonymous

when a figure is moved so that it "slides" from location to another, this is called what type of movement in geometry?

2007-11-06 03:25:52 · 5 answers · asked by sindiercanales 1

2007-11-06 03:25:02 · 6 answers · asked by amanda h 1

can someone take me through the steps of solving dy/dx of the equation y=4/x^2+X√x.
Thankyou.

2007-11-06 03:24:37 · 1 answers · asked by Anonymous

2007-11-06 03:23:29 · 15 answers · asked by Alexander 6

2007-11-06 03:17:23 · 13 answers · asked by Anonymous

How do you derive the equation Cov(x1, x2) = E[(x1-mu1)*(x2-mu2)] from the alternate equation for Covariance, Cov(x1,x2) = E(x1x2) - E(x1)E(x2) ? I am positive that I have to go from the latter to the first mentioned. I know E(x1)=mu1 and E(x2)=mu2 but I am not quite sure where to go from there.

2007-11-06 03:12:30 · 1 answers · asked by Anonymous

2007-11-06 03:12:16 · 1 answers · asked by Anonymous

The figure shows a circle with radius 1 inscribed in the parabola y=x^2 . Find the center of the circle.

Please give me step by step instructions if you can!
Thanks

2007-11-06 03:09:37 · 3 answers · asked by George23 3

Write a quadratic equation ( in the form ax^2+bx+c=0) whose roots are 2 and -2/3

I think I should work backwards from the roots to find the quadratic equation but am unsure how to do that.

2007-11-06 03:03:06 · 6 answers · asked by Anonymous

Is there a method for solving a SYSTEM of two differential equations of second order with two variables, without reduction to a system of 4 differential equations of first order?

2007-11-06 02:59:45 · 1 answers · asked by Wintermute 4

please i need help with these questions: #16 & 18
http://us.f13.yahoofs.com/bc/43dc7fa3med69b7ae/bc/algebra/MA105DE%5B1%5D.Proctored+Exam.050721.pdf?BCosIMHB3UPrKM3b

2007-11-06 02:31:00 · 1 answers · asked by austin 1

9-(a^2+2ab+b^2)
how do you work that one out?!
I am in calculus, and in algebra, this is the first time I've encountered a problem I couldnt easily do, let alone be stumped!

2007-11-06 02:30:05 · 4 answers · asked by Live to Serve 1

Square root (2x+3)- square root(x+1) =1


I don't know how to enter square root symbol on the computer, so equation in ( ) is supposed to be under sq rt symbol.

2007-11-06 02:18:20 · 4 answers · asked by fastcatz007 2

c varies jointly as a and b, and c=84 when a=70 and b=30


What is this asking and how do I go about solving?

2007-11-06 02:13:32 · 1 answers · asked by fastcatz007 2

1) Find the standard matrix for the linear operator defined by the equations, determine whether the operator is one-to-one.
w_1 = 2x_1 - 3x_2
w_2 = 5x_1 + x_2

2) Show that the range of the linear operator defined by the equations
w_1 = x_1 - 2x_2 + x_3
w_2 = 5x_1 - x_2 +3x_3
w_3 = 4x_1 + x_2 + 2x_3
is not all of R^3, and find a vector that is not in the range.

2007-11-06 02:12:38 · 2 answers · asked by Anonymous

I'm not sure how to describe how linear functions are related to the arithmetic sequence.

2007-11-06 02:08:57 · 1 answers · asked by Anonymous

2007-11-06 02:04:11 · 2 answers · asked by Anonymous

find out the numerical coefficient of each term of the following algebraic expression (also plz.explain the solution as i am weak in maths.)
x3-7x2y+5xy2-2

2007-11-06 01:55:20 · 2 answers · asked by Anonymous

I just need to check my answers. I'm pretty sure I have them all figured out, but I need to see please.

a) y= x^3*2^x

b) y= ln cubed root(6x+7)

c) y= e^ex ln x

d) y= log_4(x+e^x+e)

e)y= sec(1/sqrt x)

2007-11-06 01:44:16 · 2 answers · asked by Anonymous

How did Pythagoras figure out that if you square the legs of a right triangle and add them together you get the length of the hypotenuse squared? (in other words, how did he figure out the Pythagorean theorem?

2007-11-06 01:31:08 · 9 answers · asked by A A 3

How can you determine if a relationship is a function?
Explain please

2007-11-06 01:29:34 · 3 answers · asked by Anonymous