Mathematics - 7 July 2007

2007-07-07 23:30:20 · 16 answers · asked by cakko 1

cos(2 theta) = 4 - 7sin(theta) for 0 < or = to theta < or = to pi

Tried plugging some radians between that range, but can't get to a clear answer. :( Help?

2007-07-07 22:36:03 · 3 answers · asked by Pamela 2

Given the three points A(2,-3,1), B(-4,-2,6) and C(1,5,-3) can you please help me find the vector from A to the midpoint of the straight line joining B to C? Thanks!

2007-07-07 22:10:11 · 3 answers · asked by Kresnik 2

Drawings & images helpful

2007-07-07 21:56:11 · 6 answers · asked by mnd_wee 1

x∈R
f(x²+1)=(x²)²+5x²+2
f(x²-1)=?

2007-07-07 20:30:49 · 5 answers · asked by Anonymous

cosA cosB + sinA sinB sinC=1

Please show the details.

2007-07-07 20:12:09 · 4 answers · asked by Amir 1

The difference between the simple interest and the compound interest accrued in two years on a certain sum at a certain rate of interest is Rs 80 . If the simple interest for the second year is Rs 1000 , find the sum .

(1)Rs 10000
(2)Rs 12000
(3)Rs 12500
(4)Rs 15000


what it means ".....If the simple interest for the second year is Rs 1000...."

it says in second year the interest is Rs 1000.
does it means in 2 years 1000+1000 rs = 2000 Rs interest ?

2007-07-07 19:57:14 · 2 answers · asked by Anonymous

The roots fo the quadratic equation 16x^2 + 7x + 4 = 0 are α^2 and β^2 . Find

(i) a quadratic equation whose roots are 1/α^2 and 1/β^2 ,

(ii) two distinct quadratic equations whose roots are α and β .

2007-07-07 19:35:12 · 2 answers · asked by icydollie xD 1

2007-07-07 19:08:00 · 10 answers · asked by ajay s 1

one circumference has 100 one digit numbers, the other circumference has 1000 1 digit numbers( the circumferences are of different radii) how many two digit numbers do you arrive at if you rotate the circumference with 1000 1 digit # (stopping at each #) also if you rotate the crcumference w/100 one digit #'s

2007-07-07 19:06:12 · 5 answers · asked by Book of Changes 3

2007-07-07 18:33:36 · 5 answers · asked by Anonymous

2007-07-07 18:22:11 · 13 answers · asked by Anonymous

If you have a parabola on a graph and three of the points are...
(1, 19) (-1, 7) (-2, 13)
how can you find the quadratic equation, or function, for that graph?

2007-07-07 18:21:59 · 5 answers · asked by Anonymous

Please solve this division for me .

2007-07-07 18:01:03 · 5 answers · asked by ravi 2

My semester grade is 2/3 course work and my final is 1/3. How do I determine my final grade??

2007-07-07 17:49:50 · 3 answers · asked by My OnLy HoPe 1

(√3 / √6-1) - ( √3 / √6+1)

Sorry this is correct. The square root of 3 divided by the square root of 6-1. subtract the square root of 3 divided by the square root of 6+

2007-07-07 17:34:35 · 6 answers · asked by Anonymous

(x^4 - 4x ^2 - 5) (x ^2 - x +2)

2007-07-07 17:31:43 · 3 answers · asked by Anonymous

2007-07-07 17:29:22 · 7 answers · asked by peaches 1

How many square feet of carpeting are needed to carpet a 12-foot by 12-foot room?

2007-07-07 17:22:06 · 13 answers · asked by kill 1

what the hell is 4+6

2007-07-07 16:43:48 · 13 answers · asked by Anonymous

Ronald has 12% of fertile. How much pure to grow should he add to get 32 ounce of a 17.5% concentration?

please help me.

heres da next question.

How many ounces of water must be added to 20 ounces of an 8% salt solution to make a 2% salt solution?

please help me, and thank you. =)

2007-07-07 16:41:43 · 4 answers · asked by Ashley M 1

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

2007-07-07 16:31:10 · 9 answers · asked by curiosium 1

I have a calculus problem that involves the chain rule (note: I am in Calculus I with Analytical Geometry).

Find the Second Derivative (y") of

(1+ (1/x)) to the power of three.

2007-07-07 16:18:14 · 7 answers · asked by alimerzairan 1

It it takes 26 hours for Maria to paint a house, and it takes 22 hours for Patty to paint the house, how long will it take them working together? round to the nearest minute.

2007-07-07 16:04:45 · 7 answers · asked by *05* 1

suppose an airplane travels a distance of 3,000 miles going with the wind, but would have only gone 1,960 miles flying against the wind for the same amount of time. If the speed of the plane in still air is 620 miles per hour, what is the speed of the wind in miles per hour?

2007-07-07 15:55:46 · 6 answers · asked by *05* 1

find the the following of the series

series (1-infinity) of (n+1)*(x+4)^n / (7^n)*(5n-3)

center?
radius of converenge?
interval of convergence?
do the end points converge (absolutely or conditionally?)
do the end points diverge?

I got center: -4
radius of convergence : 7
interval of convergence: -11 I am not really sure about the last two questions.
Can someone help me out on this?

Thanks,
Mark

2007-07-07 15:55:41 · 1 answers · asked by Mark 2

first word barley second word football

i have no idea how to do this so please explain EXACTLY how you do it. i have a Ti-84 calculator. please write EVERYTHING that you do.
i sincerly appreciate it. thank you very much!

2007-07-07 15:49:23 · 2 answers · asked by Elizabeth 3

If the sum of 3 unequal positive integers equals 35, what is the largest possible value of the smallest integer?

a) 8 b) 9 c) 10 d) 11 e)12
pls show work or explain

what does "unequal" integer mean?

2007-07-07 15:45:55 · 5 answers · asked by ? 2

Solve each system of equations.
-10x - y + 8z = 170
x - 6y + 7z = -229
-x - 4y + 5z = -91

A x=-44, y=-10, z=-35
B x=-45, y=-14, z=-40
C x=38, y=22, z=-26
D x=-2, y=-7, z=1
E x=5, y=-4, z=9
F x=24, y=-19, z=41

2007-07-07 15:32:19 · 3 answers · asked by Anonymous

2007-07-07 15:23:23 · 2 answers · asked by selin 1