Mathematics - 24 December 2007

4(x-5)(x+5) + 2(3x +2)^2

2007-12-24 09:56:40 · 21 answers · asked by Anonymous

I'm having a problem with this seemingly easy limit question:

find the limit of (x^2-3x+2)/(x^3-4x) as x approaches 2 from the right, as x approaches -2 from the right, as x approaches 0 from the left, and as x approaches 1 from the right

2007-12-24 09:32:12 · 5 answers · asked by Anonymous

2007-12-24 09:14:26 · 11 answers · asked by Anonymous

Jamie is looking to buy some caramel corn for gift baskets. She can get 4, 1/2 pound bags for the same price that she can get 5, 1/3 pound bags. What is the difference between the amounts she would get?

11/12 pound
1/3 pound
5/8 pound
1/5 pound

2007-12-24 09:07:30 · 7 answers · asked by sunny p 1

The following diagram is often used to illustrate one of the many proofs of the Pythagorean Theorem.

http://www.mathsisfun.com/geometry/images/pythagorean-theorem-proof.png

But first, I think a lemma needs to be proven showing that the construction is even possible, and specifically that the quadrilateral with sides of length "c" is indeed a square. It needs to be a square to prove the Pythagorean Theorem.

No website that explains the proof ever mentions the lemma. When is proving a lemma, first, necessary?

2007-12-24 09:01:40 · 3 answers · asked by Anonymous

A positive integer is perfect if it is the sum of all its positive factors except itself. There are two perfect integers less than 30. What are they?

Can you help?

Thank you.

2007-12-24 08:56:27 · 5 answers · asked by Anonymous

Erica was making cookies. The recipe called for 3/4 cups of sugar. Erica only has 1/8 cup of sugar. How much more sugar does she need?

3/4 cups
1/4 cups
5/8 cups
3/8 cups

2007-12-24 08:49:00 · 14 answers · asked by sunny p 1

just thought you'd like to know

Merry Christmas

2007-12-24 08:47:18 · 12 answers · asked by Anonymous

2007-12-24 08:28:40 · 2 answers · asked by Joe D 1

how do you write two equations that represent parallel lines? also how do u write equation representing a perpendicular line?

2007-12-24 08:16:27 · 6 answers · asked by Anonymous

What is your degree in ...is it a masters, BSc, Ba, Ph.D, etc

and what is your IQ?

2007-12-24 08:16:23 · 21 answers · asked by Anonymous

I just want a simple defintion of twelve.

2007-12-24 08:10:01 · 11 answers · asked by Al 1

Find all positive integers n such that phi(n)=6. Prove that you have found all solutions.

Thanks

2007-12-24 07:55:47 · 1 answers · asked by Astalav 1

good? Bad? Capacity? Application? Gaaaammmmmeeee onnnnnnn!

Play Ball(ohhh sayyy cannn youuu seeeee....by..)

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

2007-12-24 07:10:34 · 6 answers · asked by SophiaSeeker 5

Okay Dont call me stupid or anything but what is calculus?
Im british and we dont do calculus [ well we prob do, but call it something else]

Can someone please enlighten me?

Happy Crimble everyone

2007-12-24 07:06:09 · 10 answers · asked by Anonymous

is it possible to find surface area of car in inches squared given:
Length= 169.3 in
Width= 74.8 in
Height= 45.9in

2007-12-24 07:05:21 · 3 answers · asked by OCHOA 2

There are four ways that a system of equations can be solved: graphing, substitution, elimination, or using Cramer’s Rule.

but what are the differences?
I can you simply explain how to do these types of problems?

2007-12-24 07:00:23 · 4 answers · asked by Anonymous

2007-12-24 06:38:01 · 7 answers · asked by sparkle_disliker 3

can you please put these in order from least to gratest?
*megabyte
*gigabyte
*kilobyte
(what is a 'byte' anyway?)
if you can , please put in the convesion equations : )

2007-12-24 06:31:12 · 3 answers · asked by coldfire_blacksheep 2

y = 1n (x+3)
x = 1n (y +3)
e^x = y + 3 <--- this is the part i dont understand
e^x - 3 = y

like what rule or defintion allows this step. how come when you put e^x, the 1n disappears? help please, im so confused. i want to understand.

2007-12-24 06:20:13 · 5 answers · asked by sharizzle 1

A sequence of integers is defined for n=1,2,3,....
by:

a_n= n + (n-1)(n-2)(n-3)(n-4)(n-5)(c-6)/120

where c is any given integer (positive or negative). What are
the 6 first terms of the sequence?

2007-12-24 06:15:36 · 3 answers · asked by mathman 3

. a) How long would it take for a 1 g sample of Polonium 210 to lose 3/4 of its mass if it's half-life is 140 days?

b) How long will it take before it loses all but 1/128 of its inital mass?

Answers a= 280 b= 980 days

2. At the end of 15 days, one eight of a raidoactive sample of Bismuth 210 remains. What is the half-life of this element?

answer 5 days

can't get these answers

2007-12-24 06:03:55 · 4 answers · asked by Anonymous

...and why?...

2007-12-24 06:01:13 · 9 answers · asked by koolkid776 1

2007-12-24 06:00:17 · 4 answers · asked by sparkle_disliker 3

y = 1n (x+3)
x = 1n (y +3)
e^x = y + 3 <--- this is the part i dont understand
e^x - 3 = y

like what rule or defintion allows this step. how come when you put e^x, the 1n disappears? help please, im so confused. i want to understand.

2007-12-24 05:58:24 · 3 answers · asked by sharizzle 1

2007-12-24 05:50:21 · 4 answers · asked by Anonymous

2007-12-24 05:48:33 · 1 answers · asked by Anonymous

1. a) How long would it take for a 1 g sample of Polonium 210 to lose 3/4 of its mass if it's half-life is 140 days?

b) How long will it take before it loses all but 1/128 of its inital mass?

Answers a= 280 b= 980 days

2. At the end of 15 days, one eight of a raidoactive sample of Bismuth 210 remains. What is the half-life of this element?

answer 5 days

can't get these answers

2007-12-24 05:46:56 · 3 answers · asked by Anonymous

I cant seem to factor that looking for help =D

2007-12-24 05:36:56 · 5 answers · asked by Hershey 1

5 ln x = 35

if you don't mind please work it out, it'll help a lot. and please explain how you got the answer, thanks.

2007-12-24 05:34:39 · 2 answers · asked by sharizzle 1