Mathematics - 9 July 2007

2007-07-09 11:59:42 · 8 answers · asked by Fi 2

Simplify. Help please, I am really struggling and I have a test over this stuff in a week!

2007-07-09 11:47:26 · 5 answers · asked by Anonymous

I am checking my work and answer. I'm using the Integral test.

∞
∑ n^(-1/4) gives me f(x) = x^(-1/4)
n=1

∞
= ∫ x^(-1/4)dx
1

= lim ∫ x^(-1/4)dx
r->∞

........................ r
= x^(3/4)/(3/4) | = [(r^(3/4))/(3/4)] - [1/(3/4)] = ∞ - (4/3)
....................... 1

Which is Divergent? It doesn't feel right to me.

2007-07-09 11:47:03 · 2 answers · asked by ? 3

factor completely with respect to the integers.

3x^2-48

thanks!

2007-07-09 11:41:28 · 6 answers · asked by Anonymous

I'm going to be doing some survey data input into a database and I was wondering what type of graph to use. This got me thinking about what graph type is used for which? What are bar graphs for? pie graphs? histograms? etc. Could someone tell me what each type of graph does and what it's used for please? Thanks in advance!

2007-07-09 11:40:35 · 2 answers · asked by Rwar 2

simplify each radical expression:
1.
-√m^4n^7

and

2.
1/5√[(75xy^2) (z^3)]

2007-07-09 11:39:01 · 3 answers · asked by Anonymous

2x + 8
--------- ?
x + 4

2007-07-09 11:26:33 · 5 answers · asked by Anonymous

2007-07-09 11:08:14 · 3 answers · asked by wu_4533 2

4x+3y = 2 and 5x-7y = -19

I already know that x=-1 and y=2 but if you know how, please find the answer(in an algebraic equation) to each of the expressions above and explain the processes thoroughly. Serious answers please. Thank you

why do you multiply everything on the first equation by 7 and the second equation by 3?


what do you do and why so to get -43 and 43?

2007-07-09 11:05:57 · 5 answers · asked by curiosium 1

can someone help me out on this what i need to know is what is the period of the sine curve cos(4x) for x = 0 to 2 pi

i need to know the period in degrees and radians please.

any help gladly appreciated.

Thanks
Eggie

2007-07-09 10:58:38 · 8 answers · asked by l1khs 1

What is the basic DIFFERENCE, in terms of definition, between the domain and range of functions?

I am looking for simple terms NOT MATH BOOK jargon.

2007-07-09 10:55:32 · 4 answers · asked by Sharkman 1

In a recent survey in Canada, 78% of men shave with a razor blade, which is 1.5 times the percentage of men in Canada who shave with an electric razor. What is the percentage of men in Canada who shave with an electric razor?

2007-07-09 10:40:25 · 4 answers · asked by Dedra A 1

the probability that a roulette wheel stops on a red number is 18/37. For each bet on "red, you are returned twice your bet (including your bet) if the wheel stops on the red number, and lose your money if it does not .

if you bet $1 on each of 10 consecutive plays, what is your expected winnings?

2007-07-09 10:29:47 · 4 answers · asked by Anonymous

2007-07-09 10:09:12 · 8 answers · asked by Anonymous

2007-07-09 10:05:27 · 1 answers · asked by Book of Changes 3

if any1 is good at math can u explain to me how to go about this problem setp by step and what the final answer is?! Thanks!

2007-07-09 09:51:32 · 8 answers · asked by Anonymous

find the missing factor

16x^3-54=2(2x-3)(?)

thanks!

2007-07-09 09:44:17 · 5 answers · asked by Anonymous

thanx- college algebra

2007-07-09 09:40:21 · 4 answers · asked by Anonymous

2007-07-09 09:35:52 · 7 answers · asked by Alex 1

What are the steps in solving this problem?
Thank You!

2007-07-09 09:07:29 · 8 answers · asked by Anonymous

So if there's a group of 7 girls and 9 guys, how many ways can a group of 5 people be selected if at least one is female?

if there's one girl, I got 882 possibilities
for 2 girls, I got 1764 possibilities
for 3 girls, I got 1260 possibilities
for 4 girls, I got 315 possible
for 5 girls, I got 21 possible

adding those up, I got 4,242 possible. Please double check. If I'm wrong, then help explain.

As a second part, how many possible if you have to have at least 1 girl and one guy in the group? For this one I just subtracted the 21 from 4,242 and got 4,221.

Thanks in advance!

2007-07-09 08:46:41 · 3 answers · asked by mr_peepers810 5

I know of the ellipse equation, (x-h)^2/a+(y-k)^2/b=1. I have been unable to isolate either x or y, which if anyone can help me with this than, I can write my own program, and I will be happy. Or.... If anyone knows of an algorithm or code that can draw unfilled ellipses, written in C, VB, or ASM, I would also been very happy. Either way the problem is solved. It would be a very big bonus if it were written in ASM, seeing that, that is what I'm programming in. LAST NOTE: The procedure should only require the middle x,y coordinates of the ellipse and the width and height of the ellipse. Thank you to all who reply.

2007-07-09 08:43:43 · 4 answers · asked by Bridgeofstraws 2

Solve
(5x+3)(2x-7)=0
does this equal -3/5, 3????

im lost. need some help..thanks

2007-07-09 08:40:58 · 8 answers · asked by jesis332 1

The winning times in the 500 meter speed skating world championships for men are approximated by m= 46 - 0.1y and for women by w=57 - 0.2y, where y is the time in years since 1900(so y=5 is 1905, for example) and m and w are the times in seconds. Using these approximations in what year will the mens' and women's times be equal?

2007-07-09 08:39:25 · 3 answers · asked by Anonymous

factor completely with respect to the integers.

1-64x^3

thanks!

2007-07-09 08:37:34 · 3 answers · asked by Anonymous

1.(5/60(18/25)=3/5
2.(3m/2)(n^2/9)
3.(x/30)^3
4.(x-3/2)^3(1/x-3)^2
5.(x^2 - 9/ x+2)(x^2 - 4/ x - 3)
6.(x^2 + 5x + 4/(x + 3)^2) Divided by (x + 1/x^2 - 9)
Thnx for your help

2007-07-09 08:18:53 · 2 answers · asked by soccermom71968 1

2007-07-09 08:09:40 · 6 answers · asked by Anonymous

I got my electric bill and it is close to $200 for an apartment. The reason being my ML is never here but she keeps the lights in her room on all night long for a bird. She says because she isn't here (at night) she doesn't use any elec. So I am trying to figure out exactly how much she uses so we can charge her for it. Its a 60 watt bulb runs on average 20hrs/day plus on top of that she runs a fan and her tv(again all night). I've tried to turn them off when she isn't here and she says well I pay the bill I have the right to use as much as i want. Well when bills over run her budget my husband and I have to make up for it which takes away from our twin infants. We had over 2000 saved up and I checked the account today we have 250 from having to cover her so much. I just want to be able to shove this in her face and make her accountable.

2007-07-09 07:50:52 · 8 answers · asked by mom_of_twins28 1

It say the floor is 7,329 square feet. The Length is 110 feet while the width is 1/2xL,It says that area was destroyed by a fire. And wants to know how much of the floor wasn't burned.If don't know if I explained this well enough but I tried.

2007-07-09 07:44:50 · 5 answers · asked by lovlouis 2

A powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. A group of 50 men (group 1) and 40 women (group 2) were asked if they thought sexual discrimination is a problem in the United States. Of those sampled, 11 of the men and 19 of the women did believe that sexual discrimination is a problem. If the p value turns out to be 0.035 (which is not the real value in this data set), then

A) at α = 0.05, we should fail to reject the null hypothesis
B) at α = 0.03, we should reject the null hypothesis
C) at α = 0.04, we should reject the null hypothesis
D) None of the above would be correct statements.

2007-07-09 07:38:31 · 3 answers · asked by LG 1