Mathematics - 7 November 2007

points a (2,5) and b (7,8) lie on a line. what is the equation of the line in standard form { ax + by = c } ?

2007-11-07 23:57:22 · 5 answers · asked by Anonymous

any general formula?

All i know is that "product of all factors" of N = (a^b) x (c^d) x ... = a^(1+2+...b) x c^(1+2+...d) x ....

Any similar thing to find "sum of all factors"?
Thank you.

2007-11-07 23:16:06 · 2 answers · asked by ʞzɹәႨnɹ 2

e.g>> 100 - 59.60=
50 - 26.10=

Help !! i cant do this sum mentally........
Can somebody help me pls??
I am 15 yrs old..........
Is there any problem with me?
Are there easily ways/method to do it??

2007-11-07 23:15:33 · 6 answers · asked by Anonymous

My question-

Find 4 no.s such that sum of any 2 is a perfect square and sum of all 4 is also a perfect square.

2007-11-07 22:49:54 · 5 answers · asked by Hero of all times!! 1

2007-11-07 22:20:26 · 5 answers · asked by macai tan 1

Differentiate the following:

F(t) = ln ((2t+1)^3/(3t-1)^4)

please show all working out and formulas used thanks in advance

2007-11-07 21:08:42 · 3 answers · asked by Anonymous

2007-11-07 20:45:46 · 6 answers · asked by qynabc 1

2007-11-07 20:19:49 · 8 answers · asked by Anonymous

Question: What is the minimum value of the sum of a positive real number and its reciprocal?


And please explain. x_x;; Thank you in advance!

2007-11-07 18:52:46 · 1 answers · asked by Anonymous

50cos9x = -240 + 15 (w + (sqr rt of (57 + 50sin9x)/16))
Please include steps and perhaps rationale.

2007-11-07 18:31:31 · 1 answers · asked by David 3

Please find a counterexample to the following:
note: S and T are subsets of R (set of all real numbers)

1. if set S is closed, then the closure of the interior of S = S

2. bd ( cl S ) = bd S

3. bd ( S union T ) = ( bd S ) union (bd T)

thanks so much

2007-11-07 18:19:50 · 2 answers · asked by phil h 2

How many bit strings of length 10 either begin with 5 consecutive 0's or 5 consecutive 1's?

That is : 00000_ _ _ _ _ or 11111_ _ _ _ _

Im way to tired, im sure it is simple but my brain is dead. :(

2007-11-07 18:19:04 · 2 answers · asked by webnerd 2

this was posted on my space... via bulletin.. i can not find it can you??

FIND THE ERROR!!! THIS IS HARD!!

000
111
222
333
444
555
666
777
888
999

Did you know that 80% of UCSD students
could not find the error above?

2007-11-07 17:49:57 · 10 answers · asked by Anonymous

If two angles in a ____ are congruent, the rays are perpendicular.
The word(s) is/are 10 letters altogether. If it is two words, there is no space between them.
The 2nd letter is I, 6th letter is R, and 10th letter is R.
Thanks in Advance.

2007-11-07 17:31:19 · 3 answers · asked by janetツ 3

2007-11-07 17:18:12 · 15 answers · asked by namso141 3

Find the solution to the differential equation below, subject to the given initial condition.

1) P(dB/dt)= 0, P(0)= 1
P(t)=?

2007-11-07 17:03:28 · 1 answers · asked by Victor 1

There are fewer than 6 dozen eggs in a basket. If I count them by 2s, there is 1 left over. If i count them by 3s, there are 2 left over. If I count them by 4s, 3 are left over. If i count by 5s, there are 4 left over. HOw many eggs are there????


I know it's an odd number and its a pattern.

2007-11-07 16:59:10 · 5 answers · asked by Steffi loves Bob!!! 1

Okay...I have this problem that I need help on solving...

1. a) Use rectangles to estimate the area under the curve y=x^(2) + 1, using 4 rectangles. Do so using the left endpoint of each interval.

b) Is your estimate an "overestimate" or an "underestimate" of the true area underneath the curve y= x^(2) + 1?

c) Determine the "actual area" under the curve y=x^(2) + 1 by evaluating the integral on the interval [0,1].

If anyone can...Please help me...Thanks in advance...

2007-11-07 16:57:56 · 3 answers · asked by Anonymous

lim tan6x/sin2t
x-> 0

i know the answers 3 by using the table method but i need to know how to work it out using trig functions? Any help would be sweet.
cheers

2007-11-07 16:49:31 · 2 answers · asked by Anonymous

A. 1 1/3 x 2/5
B.) 1 2/3 x 3/5
C.) 1 1/4 x 1 1/2
D.) 4/5 x 2/3
thnx

2007-11-07 16:31:23 · 2 answers · asked by Anonymous

(1,2), (3,4)

I did this a while ago, but I forgot everything about it.

2007-11-07 16:29:56 · 6 answers · asked by Joyce W 2

2007-11-07 16:27:54 · 2 answers · asked by SimpleMe 2

[ -1 5 9 -7 ]
[ 2 1 6 0 ]
[ 1 2 -4 8 ]

The question states tat I need to use gaussian elimination to calculate the determinant of the matrix.

This is what I get for the reduced matrx ( I cant seem to go any further )

[ 2 1 6 0 ]
[ 0 11/2 12 -7]
[ -3 0 -16 8 ]

Now how does this allow me to find the determinant more easily ? Thanks for your help

2007-11-07 16:23:06 · 2 answers · asked by Anonymous

Find the two points on the curve y = x^4 - 2x^2 - x that have a common tangent line.

2007-11-07 16:21:24 · 1 answers · asked by Anonymous

Find all values of x in the interval of [0 degrees, 360 degrees] that satisfy this equation

2 sin x =cos x

show the steps please!

2007-11-07 16:17:28 · 4 answers · asked by Nicky 2

2007-11-07 16:14:55 · 3 answers · asked by SimpleMe 2

solve for x ._.
x^2 - x / 2x = 3 ^x
thanks : )

2007-11-07 16:14:34 · 2 answers · asked by Henry Chan 1

67% of vehicles on the roads during rush hour are occupied by just the driver.

a) If you choose 380 vehicles at random, the mean number of vehicles that carry just the driver is ________ and the standard deviation is ________

b) If you choose 380 vehicles at random, the mean proportion of vehicles that carry just the driver is ________ and the standard deviation is ________


Please and thank you =)

2007-11-07 16:10:43 · 3 answers · asked by Anonymous

A closed rectangular box with a square base is to be built for a cost of $60. The material for the base costs $3 per square foot, the material for the top costs $2 per square foot, and the material for the sides costs $1 per square foot. What is the maximum volume of such a box?

2007-11-07 16:04:29 · 2 answers · asked by whoo_kidd1 1

Please tell me how to do this problem
match the coefficient of determination to scatter diagram r^2=0.58

2007-11-07 16:02:00 · 1 answers · asked by Anonymous