Mathematics - 1 July 2007

So everyone knows that the formula of the point-slope form is (Y-Y1)=m(X-X1) in which that (m) is your slope, and (x,y) is your point. What do you do when your slope is a fraction?

Here's an example...

(2,6), m -2/3

Can anyone help? I'm good at math, but terrible at fractions....

2007-07-01 23:52:41 · 5 answers · asked by lilcreator 1

how much additional money must be invested at an annual simple interest rate of 9% so that the total annual interest earned is 7.5% of the total investment.

explain the answer

2007-07-01 23:49:55 · 6 answers · asked by finny 2

I have a 1-dimensional curve (e.g. Gaussian). What is a measure of its sharpness, i.e. whether the area under it is more concentrated around the center or more 'widespread'? I would like to have a universal measure which is independent of the exact shape.

2007-07-01 23:42:57 · 5 answers · asked by jmatejic 2

2007-07-01 22:38:28 · 3 answers · asked by pat 1

2007-07-01 22:23:08 · 4 answers · asked by wilbert c 1

(c)Ang, Bakar and Chandran, each decided to open a fixed deposit account of RM10000 for 3 years without any withdrawal.

-Ang keeps the amount at an interest rate of 2.5% per annum for duration of 1 month renewable at the end of each month.

-Bakar keeps the amount at an interest rate 3% per annum for duration of 3 months renewable at the end of every 3 months.

-Chandran keeps the amount at an interest rate of 3.5% per annum for a duration of 6 months renewable at the end of every 6 months

(i) Find the total amount each of them will receive after three years.

(b)If Chandran starts his investment with RM500 instead of RM300 at the same interest rate, calculate on which birthday will the total investment be more than RM25000 for the first time

2007-07-01 22:14:59 · 2 answers · asked by Anonymous

So according to Bob Dorough and De La Soul, "3 is the magic number". However, from a mathamatical point of view, is there a more "magical" number than 3. I am looking mainly for a scientific answer, but humourous ones will also do.

2007-07-01 21:44:46 · 11 answers · asked by Spawnee 5

If the present price of cycle is Rs. 1,210 , its price two years ago was ?

a) 1,000
b) 2,100
c) 1,700
d) 1,900

2007-07-01 21:37:11 · 6 answers · asked by shakthi 1

Find the distance traveled by each., if one takes 16 minutes longer than the other.


a) 5
b) 60
c) 8
d) 16

2007-07-01 21:36:08 · 4 answers · asked by shakthi 1

a) 6
b) 5
c) 8
d) 3

2007-07-01 21:32:35 · 3 answers · asked by shakthi 1

1. x4+5=y2
2. y=^(x+3)
3. x3+y2=5
4. x2=y2
5.y2=x2-2x
6.y3=x2-2x

2007-07-01 21:29:41 · 2 answers · asked by Anonymous

2007-07-01 21:09:45 · 3 answers · asked by Anonymous

Can someone please explain this to me simply? I don't know anything about graphs or functions!

2007-07-01 21:02:58 · 5 answers · asked by checked.cherry 2

A baby having born in between, the average age of the family is same today. When was the baby born?

a) 1 year ago
b) 2 years ago
c) 3 years ago
d) just today
e) none of the above

2007-07-01 20:48:26 · 6 answers · asked by BLAZER...! 1

I'm stuck on this question:

I need to convert this rectangular equation,
x² - y²= 1,
into a polar coordinate equation. I know that it can equal
r²cos²φ - r²sin² φ = 1,
which is also equal to
r² (cos²φ - sin²φ) = 1,
but I don't know what to do from here. Can you help me out?

2007-07-01 20:47:48 · 2 answers · asked by Anonymous

consider the points a=(-1,2),b=(6,4) and c=(1,-20) in the plane.For how many different points d in the plane are a,b,c,d are the vertices of a parallelogram

2007-07-01 20:41:10 · 3 answers · asked by Anuj S 1

(Zeno's Paradox) Achilles (A) and a tortoise (T) have a race. T gets a 1000 ft head start, but A runs at 10 ft/sec, whereas T only does .01 ft/sec. when A reaches T's starting pt, T has moved a short distance ahead, etc. Zeno claimed that A would never catch T. show that this is not so.

2007-07-01 20:10:28 · 2 answers · asked by la 1

Me and my friend came out with the answer of pt-slope form = y+7=-2/5x and standard form=2x+5y=-35. My teacher said the way we got the answer was wrong. How would you work this out?

2007-07-01 20:04:38 · 3 answers · asked by Anonymous

I think the answer, I GOT, is y-4= -1 (x-8). If this is correct, how would you work it out?

2007-07-01 20:02:11 · 4 answers · asked by Anonymous

2007-07-01 20:01:45 · 5 answers · asked by Anonymous

2007-07-01 19:58:57 · 6 answers · asked by Anonymous

I was just bored, and I came up with these two ways to calculate pi.
There may be an error or two, I can't find my calculator to check it, if so, let me know and I will repost this with the correction.

lim(x->0) (180sin(x)) / (x(sin((180-x)/2)))

and

lim(x->inf) (x(sin(360-x))) / (2sin((x-180)/2))

(Ignore the spaces before & after the division signs, they are to make it so that Y!A doesn't condense the equations)

Using degrees here...


So ya, I guess I am asking if these two methods are correct, and if they may have any significance.

2007-07-01 19:38:10 · 7 answers · asked by Anonymous

A_n = 2^n / 3^(n+1).

I'm not sure how to find the limit.

2007-07-01 19:27:07 · 3 answers · asked by Anonymous

3x-2y=6
5x +3y= -9



factor than solve the following equations:
4x^2 +4x+1=0





x^2-8x+16=0

2007-07-01 19:08:26 · 5 answers · asked by callmejeseca 1

Sue has a balance of $35 in her checking account. She writes one check for $10, and three checks for $9 each. What is her balance now?

A. $18
B. -$2

C. $54

D. -$11
b?

2007-07-01 19:04:35 · 5 answers · asked by wolf_in_da_room 1

one number is eight less than another. the product of the two numbers is 345. what are the two numbers?

Show steps please. Ty!

2007-07-01 18:50:32 · 9 answers · asked by I'm B O R E D 2

pounds =60 kilograms

2007-07-01 18:47:52 · 16 answers · asked by overcomerconquerer 1

i don't understand what to do if a formula has the word floor in it. What do I put there?

2007-07-01 18:46:27 · 5 answers · asked by tyder21 4

thanks

2007-07-01 18:39:03 · 2 answers · asked by rockabilly.betty 2

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=2–x^2 . What are the dimensions of such a rectangle with the greatest possible area?

How do I approach this?

2007-07-01 18:30:57 · 4 answers · asked by Anonymous