Mathematics - 17 September 2007

2a (a - 5 ) - 2a (3a - 5) + a ² + 3a

Thx

2007-09-17 08:03:13 · 6 answers · asked by Dante Alighieri 3

Two questions: Please keep in mind that this is an introductory course that mixes computation and a little bit of theory. Your help will be greatly appreciated.

1.) Show that f(z)=|z| is continous.

2.) Use the fact that a function is continuous if and only if the inverse image of every open set is open to show that a composition of two continuous functions is continuous.

Please include an explanation. Thanks...

2007-09-17 07:50:30 · 1 answers · asked by linzaroo06 1

A. 2 twenties, 1 ten, 6 singles
B. 4 tens, 2 fives, 5 singles
C. 1 twenty, 3 tens, 5 singles
D. 2 twenties, 2 fives, 5 singles

2007-09-17 07:33:59 · 3 answers · asked by Sun S 1

2007-09-17 07:32:15 · 3 answers · asked by tallman 1

I'm stil at the beginning and have some difficulties

Let (X, M, u) be a mesure space such that u(X) < oo. Let f_n be a sequence of integrable complex valued functions defined on X that converges uniformly to a function f. Show that f is integrable and that Int f du = lim Int f_n du.

Show that the condition u(X) < oo is really essencial for this theorem.

Thank you for any help. Does this problem get easier if at first we suppose the functions f_n are real valued and then extend the conclusion to the complex case?

2007-09-17 07:23:20 · 2 answers · asked by Adrian 1

a 2(x - 4)^2 + 10
b 2(x - 4)^2 - 6
c 2(x - 4)^2 - 22
d 2(x + 4)^2 + 10
e 2(x + 4)^2 - 6
f 2(x + 4)^2 -22

2007-09-17 07:19:03 · 12 answers · asked by Niall R 1

please help, I am in calc and forgot how to do these...
4(a+h)^2

2007-09-17 07:01:35 · 3 answers · asked by toogood2u03 2

pre cal prob please help.

2007-09-17 07:00:27 · 6 answers · asked by icygurl205 1

barrels per month (in mutiples of 100). Find the total oil produced by the well in its second three months of operation.

2007-09-17 06:56:09 · 4 answers · asked by biomes 1

Write the equation of the vertical line that contains the point (-8, -9).

I have been trying to figure out this question but I am stumped can some one go through this with me step by step please?

2007-09-17 06:53:38 · 6 answers · asked by MEB 2

2007-09-17 06:50:46 · 10 answers · asked by sup 1

Can someone please explain to me how to do problems like -3x(x^2+2) or (2x + 5) (x^2 - x - 2).

2007-09-17 06:48:55 · 5 answers · asked by hollister89 1

If I made 72 cupcakes for 34 students in a class, how many cupcakes would each student get if they all get an equall amount?

2007-09-17 06:44:55 · 9 answers · asked by Anonymous

I'm talking about (n) factorial, as in (n!), it has something to do with permutations. And what are good math sites that explain permutation?

2007-09-17 06:38:10 · 7 answers · asked by Anonymous

You can have $1/4 coin (i.e. quarter) or $5 bill. Why not circulate $π bills?

2007-09-17 06:25:38 · 7 answers · asked by Alexander 6

Problem: The speed of light is approximately 2.998 x 10^8 metres per second. How far can light travel in...
a.) 40 seconds
b.) 5 minutes
c.) 7 hours
d.) 1 day?

Thank you so much! If you don't mind show me how you figured the problem out! Thanks again and again!

2007-09-17 06:24:21 · 13 answers · asked by youlookingood 1

2007-09-17 06:12:45 · 6 answers · asked by David goohall 1

i've tried and tried and i really cant figure out how to do these please please could you help me by telling me the method on how to finding it and the answer
Thankyou so much!

http://x-o-best-answer-princess-o-x.piczo.com/?preview=y&g=37570679&cr=5&rfm=y

2007-09-17 06:10:40 · 4 answers · asked by Anonymous

Simplify the square root, if possible - square root of 52

2007-09-17 05:54:20 · 4 answers · asked by E501P 1

why because it can be used to make multiplying easy

29*71
because (a+b)(a-b)=a^2-b^2

29*71=50^2-21^2
50^2=2500 (5^2=25 bung a couple of noughts at the end)
and 21^2=(20*22)+1 (the reverse) (2*22=44---add a zero)
therefore 29*71=2500-441=2059

want to know more ask me

also 22 rule

know all the squares up to 25
and multiplying becomes real easy trust me (ok so i am number freak)

why ask me

2007-09-17 05:40:16 · 1 answers · asked by GOLD-FLAW 2

please help!

2007-09-17 05:34:15 · 17 answers · asked by sand_illusions 4

The sum of the digit of a three-digit number is 11. If the digits are reversed, the new number is 46 more than five time the old number. If the hundreds digit plus twice the tens digit is equal to the units digit, then what is the number?

2007-09-17 05:32:14 · 5 answers · asked by Anonymous

2007-09-17 05:29:15 · 8 answers · asked by Corey B 1

lim (sin2h) (sin3h)/(x^2)
x->0

2007-09-17 05:17:33 · 3 answers · asked by jjenk32 1

four point seven times ten to the power of negative three
4 . 7 x 10 ^ - 3

does the negative power make it a fraction or a negative number

2007-09-17 04:42:15 · 10 answers · asked by Anonymous

Example: 2x+3y=1
5x+3y=16

2007-09-17 04:29:52 · 8 answers · asked by flamingo 2

Example: 2x-y=4
2x-y=6

2007-09-17 04:27:50 · 3 answers · asked by flamingo 2

Can anyone help? I need the answer to these questions:

1) Solve, then state if conditional, inconsistent, or an identity equation.
1/2b-1/2=1/4b
I did this to answer so far... but I'm not sure if I did it right:
4(1/2b-1/2=1/4b)4
4/4b-4/4=1/4b
4/4b-4/4b-4/4=1/4b-4/4b
-4/4= -3/4b
-1=-3/4b, 1=3/4b Is that right?

2007-09-17 04:18:43 · 9 answers · asked by nunyan 2

2007-09-17 04:11:16 · 5 answers · asked by Anonymous

a) Determine the ordering frequency, total ordering cost, total inventory carrying cost and total cost of running the inventory system if orders 100 units at a time.
b) Repeat (a) if orders 800 units at a time.
c) Determine the optimal inventory policy for the firm.

2007-09-17 03:56:30 · 6 answers · asked by coin 1