Mathematics - 20 September 2007

Two angles are supplementary. One angle measures 10degree less than 3 times the other. What are the measures of the two angles?

2007-09-20 15:11:44 · 4 answers · asked by DoWHATiDO 3

Its a math question, it really says Explain why the product of two absolute values is always a positive number.

2007-09-20 15:10:53 · 9 answers · asked by cccr95 1

2007-09-20 15:07:36 · 13 answers · asked by Anonymous

Suppose a 10 x 10 grid represents the number 1. Use 10 x 10 grids to represent the numbers 1.24 and 1.05. Explain how you can use the grids to compare the two numbers.

2007-09-20 15:01:06 · 4 answers · asked by Drama Queen 3

How do I find the exact value of
arcsin1
Thanks!

2007-09-20 15:00:59 · 1 answers · asked by Anonymous

2007-09-20 14:57:13 · 15 answers · asked by jesus d 1

i know one of them is x=4

2007-09-20 14:55:34 · 3 answers · asked by student 3

Im trying to find the parametric and symmetric equation for the line of the intersection between the two planes: 3x-2y+z=6 and z=4x+1/2y+5

Can someone assist me in solving the equation? I need something to get me started to solve the problem. Any help will be appreciated. thanks

2007-09-20 14:54:12 · 2 answers · asked by Tony L 1

(bi) Factorise 5x^2 + 8x + 3

I know how to do the above...Ans is (5x + 3) (x + 1)

(bii) Hence find all the factors of 583.

How to do (bii)? Show your workings clearly and explain. Thank you.

2007-09-20 14:46:26 · 3 answers · asked by Anonymous

2007-09-20 14:33:16 · 1 answers · asked by Dale G 2

ok its a trick question


if 26 clowns can blow up 26 balloons in 26 mintute, how many clowns does it take to blow up 78 balloons in 78 minutes?




ps,its not 78 clowns....

2007-09-20 14:33:06 · 6 answers · asked by psycho_girl94 2

The puzzle says that you have to draw 15 circles like this:
( )( )( )( )( )
( )( )( )( ) You have to put the numbers 1-15 into it.
( )( )( ) You can't use any number twice
( )( ) and you have to subtract the two numbers
( ) like this :

(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12) - ( 6 ) - ( 5 )

15 - 14 = 1, the 1 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 )
14 - 2 = 12 ,the 12 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12)
12 - 8 = 4, the 4 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12) - ( 6 )
8 - 3 = 5, the 5 goes directly below the two numbers.
(15) - (14) - (2) - ( 8 ) - ( 3 )
( 1 ) - (12) - ( 6 ) - ( 5 )
And so on and so fourth.

Please help,
John

2007-09-20 14:30:16 · 2 answers · asked by John 2

2007-09-20 14:28:50 · 3 answers · asked by Naveed 2

2007-09-20 14:26:09 · 4 answers · asked by Anonymous

directions say: c=5/9(f-32) for 212 degrees Fahrenheit. how do i figure this out!?

2007-09-20 14:24:07 · 7 answers · asked by k o 2

2007-09-20 14:22:44 · 6 answers · asked by natdog18 2

how do you know how many significant figures there are for a number like what are the rules...oh and like when do you use cientific notation with sig figs and when dont you....EXAMPLES PLEASE!

2007-09-20 14:14:21 · 2 answers · asked by Anonymous

how do solve a problem like this:

-3a + 16
4

it's a division bar problem

2007-09-20 14:11:56 · 8 answers · asked by H.U. Soldier 2

1. For what value of the constant c is the function f continuous on (-infinity, +infinity)? f(x)=cx^2+3x if x is less than 2 and x^3-cx if x is greater than or equal to 2

2. Find the limit. Limit as x approaches negative infinity, x+(sqrt.x^2+5x)

Gracias!

2007-09-20 14:07:50 · 2 answers · asked by stars_sun_sky 1

2007-09-20 14:07:03 · 8 answers · asked by Vanessa B 1

True or False.....................

arctan(x)=arcsin(x)/arccos(x)

and explain why.

2007-09-20 14:05:43 · 1 answers · asked by sportsguy1015 2

If r(t) * r(t) = c, then r(t) * r'(t) = 0.

r(t) is a vector valued function, and r'(t) is its derivative. c is a constant. The * indicates dot product (not sure what else to use).

I don't need a whole proof (it would be nice though), but an idea of where to start would be very helpful. A proof in two dimensions (as opposed to three) is all I need. Thanks in advance.

2007-09-20 14:03:54 · 2 answers · asked by Eric W 2

Could someone help me with this?? There is also a correction to the question: fn(0)=0

So when x= 0 fn(x)-->0
when x = 1/n² fn(x)-->+∞
when x=1/n fn(x)-->0

I don't know where it changes over from +∞ to 0 again. It's somewhere between 1/n² and 1/n but how do I figure that out??

Also if you can help with the other parts... that would be awesome!

http://i21.photobucket.com/albums/b273/q_midori/rahw2-4.jpg

2007-09-20 13:57:37 · 1 answers · asked by Anonymous

Maximize Sales= 3X1 + 2X2 + X3

Subject to: X1 + X2 + 2X3 ≤ 10
2X1 + X2 + X3 ≤ 20
3X1 + X2 ≤ 15

X1, X2, X3 ≥ 0

QUESTION: Set up the initial simplex tableau. . .
thanks..

2007-09-20 13:53:38 · 3 answers · asked by odoiii 2

and the same for 26 meters and 5 millimeters? thank you!

2007-09-20 13:49:31 · 4 answers · asked by k o 2

I've been labouring over this for about a week, but I can't get my head around radixes. I need a clear, SIMPLE explanation.

2007-09-20 13:48:57 · 8 answers · asked by Anonymous

I need help proving how the curvature of a curve given by the vector function r is k(t) = |r'(t) X r''(t)| / |r'(t)|^3.

The proof starts out like this... (btw, T = unit tangent vector)

Since T = r' / |r'| and |r'| = ds/dt
r' = |r'|T = (ds/dt) T
Apply product rule you get:

r'' = (d^2s/dt^2)T + (ds/dt)T'

I don't know what to do after. Any help?

2007-09-20 13:46:01 · 2 answers · asked by Axis Flip 3

How would you figure this out?

2007-09-20 13:42:59 · 4 answers · asked by Anonymous

What is the value of t?

I'm bloody awful at algebra. ):

2007-09-20 13:42:21 · 13 answers · asked by Rawrr 1

If you know an algebraic method to solve this one, I'd like to know how you do it.

I got 2 as a root but I am stucked in the 4th grad quotient of dividing the equation by x-2

x^5 + 2x^4 - 11 x^3 - 22 x^2 + 24 x + 64 = 0

Please, avoid general remarks like: "Use synthetic division" or "Use the rational roots theorem" (I already checked all of them and there are none) or "Take derivatives and see what the extrems are". I already did this too and I already know in which interval the roots more or less are, I found them in an approximated way too.

The thing is that this questions is in an exam I have to solve and I'd like to know how the equation is supposed to be solved, and if there is a algebraic way to do this. And no, computers aren't available during the exam.

Thanks

2007-09-20 13:26:00 · 5 answers · asked by MathTutor 6