Mathematics - 1 August 2007

6% of n = 9
and
80% of n = 20
What is the formula used to figure these out? I've done them twice for my kid but the answers are not on the answer sheet. I think the answer sheet is incorrect. Thanks

2007-08-01 04:49:14 · 8 answers · asked by oldbridgenj 1

2007-08-01 04:44:45 · 7 answers · asked by SadToday22 3

I understand why the first derivative should be zero to find out if a point is a local maxima/minima..... but can someone explain in layman's terms as to why the second derivative will help us to decide if a function is local/global maxima/minima.... what is the geometric explanation ?

2007-08-01 04:42:45 · 6 answers · asked by Pure_Blue_Poison 2

2007-08-01 04:36:08 · 2 answers · asked by Anonymous

what is the length and width.

2007-08-01 04:28:59 · 4 answers · asked by Anonymous

I just noticed people using symbols like "not equal to" (an equality sign with a slash through it) and "union of sets" (a big U . . . maybe that's all it was). How are you doing this? My math answers would benefit from the extra clarity these symbols provide . . . .

2007-08-01 04:26:22 · 5 answers · asked by Anonymous

(t+2w) / (4t) + (7t-8w) / (3t) -3

Thanks!

2007-08-01 04:20:53 · 2 answers · asked by Anonymous

2007-08-01 04:19:16 · 3 answers · asked by Denmark G 1

technical

2007-08-01 04:10:10 · 9 answers · asked by country bumpkin [sheep nurse] 7

2007-08-01 04:09:07 · 5 answers · asked by SadToday22 3

-2 + 2z-u / 2z + 9z-8u / 7z

Thanks in advance!

2007-08-01 04:06:00 · 5 answers · asked by Anonymous

Is anyone good with analyzing graphs, standard deviation, etc. Help?

2007-08-01 04:03:18 · 4 answers · asked by cats 7

2007-08-01 03:51:33 · 5 answers · asked by Payal 1

Integral of x^2 * cos(x)

2007-08-01 03:48:40 · 4 answers · asked by spphat 2

Express as a single fraction
- (9z + u) / (5z) + (8z-4u) / (3z) -2

My problme looks really confusing: negative nine z plus u divided by five z ples eight z- four u divided by three z then -2 out from the fraction.

2007-08-01 03:45:45 · 6 answers · asked by Anonymous

(5/6 y^2 x)(1/4 x^2 y)

simplify

2007-08-01 03:44:58 · 2 answers · asked by In flu3nce 2

3 MEN GO INTO A HOTEL.
THE MAN BEHIND THE DESK SAID THE ROOM IS $30
SO EACH MAN PAID $10 AND WENT TO THE ROOM.
A WHILE LATER THE MAN BEHIND THE DESK REALIZED THE ROOM WAS ONLY $25
SO HE SENT THE BELLBOY TO THE 3 GUYS' ROOM WITH $5.
ON THE WAY THE BELLBOY COULDN'T FIGURE OUT HOW TO SPLIT $5 EVENLY
BETWEEN 3 MEN,
SO HE GAVE EACH MAN A $1 AND KEPT THE OTHER $2 FOR HIMSELF.
THIS MEANT THAT THE 3 MEN EACH PAID $9 FOR THE ROOM, WHICH IS A TOTAL OF $27
ADD THE $2 THAT THE BELLBOY KEPT = $29.
WHERE IS THE OTHER DOLLAR?

2007-08-01 03:44:48 · 7 answers · asked by CSF 6

2007-08-01 03:41:24 · 7 answers · asked by Anonymous

Hello Humans,
I'm really going to try to make this as short as possible.I have a certain fear and it involves math.I have dsycalculia and I find math to be very EXTREMELY difficult.Sometimes,I feel as if I can comprehend it but then I end up getting confuse.
I'm ashame of myself,I'm 16 years old and yet don't know my multiplication nor how to divide or even simple basic.I think this all has to do with me going to this private school for about 4 years and they never never taught it was a horrible school.Now I'm currently going to be a junior in a new high school,that teaches and I don't want to feel behind.I already failed geometry in sophomore year of my new school.I must improve because math is so important for everything.
I want to study it on my own until school begins Aug 20th.
but will i have enough time? Will i be able to improve? I'm going to be taking Algebra.What if i fail? ... =/
And i cannot get a tutor at all nor someone to help me which is why i have to do it on my own.

2007-08-01 03:28:04 · 10 answers · asked by Anonymous

2007-08-01 03:08:23 · 5 answers · asked by lykastar 3

2007-08-01 02:07:15 · 12 answers · asked by Anonymous

(3,7) and (-5,1)

2007-08-01 01:51:54 · 6 answers · asked by Anonymous

why is m1 . v1 + m2 . v2
therefore m1/m2=-v2/v1
Please show steps

2007-08-01 01:48:32 · 5 answers · asked by Michael H 2

-6x+ 9y=18

Slope and y-intercept please and thank you

2007-08-01 01:47:21 · 7 answers · asked by Anonymous

The ration between A and B is
A: B 2: 5
and the ration between B and C is
B: C 3 : 7

Then what's the ration of A: B: C..?
Please explain your answer. If there are multiple way please include that one as well.

Thanks

2007-08-01 01:04:23 · 7 answers · asked by rocky 2

I need them for my homework which is due tomorrow and i've been trying to figure the answers out for two hours now and i still don't get it! can somebody help me (i'm desperate!)? please,please,pleeeeeeease???

ps. pls put the solution...

2007-08-01 00:53:36 · 10 answers · asked by ramengirl 2

3x+4y=1 and x-2y=6 is called a 2-by-2, please explain......

2007-08-01 00:41:20 · 4 answers · asked by rainwater 3