Mathematics - 30 November 2007

solve by using quadratic formula. 6x^2 - 5x = 8

show all steps!! thanks!!

2007-11-30 17:44:32 · 4 answers · asked by Aliyah 1

if the length of one side of a triangle is 5, which of following can't be lengths of other 2?
a 3 and 3
b 3 and 5
c 7 and 8
d 7 and 3
e 7 and 12

what's the correct answer? what rule tells you how to solve this?

2007-11-30 17:35:52 · 6 answers · asked by helen 2

divide. x^2 - 64y^2/5x^2 + 40 divided by (x^2 - 8xy)

solve by using quadratic formula. 6x^2 - 5x = 8

Find the x-intercepts. y = x^2 - 5x -2


Plz plzzzz help me!! i'm rele having hard time with these questions!! Plz plz help mee I know its not right to ask for home work help here!! but I am stuck with these questions! Plz explain and show all steps!!! thank you!

2007-11-30 17:32:39 · 2 answers · asked by Aliyah 1

Half of an identity and the graph of this half are given. Use the graph to make a conjecture as to what the right side of the identity should be. Then prove your conjecture.

(cot x – tan x) / (cot x + tan x) = ?

http://i128.photobucket.com/albums/p168/thevampireambriz/Pre-Calculus/7JPG.jpg

2007-11-30 17:29:29 · 1 answers · asked by ambriz_jesus6 1

I mean the sphere?? is it its volume or the surface area or what... thanks a lot

2007-11-30 17:26:08 · 1 answers · asked by tralala 1

Use a half-angle formula to find the exact value of each expression.

Tan 7Pi/8

2007-11-30 17:22:23 · 1 answers · asked by ambriz_jesus6 1

Why does February just have 28 days...why not 30?

2007-11-30 17:21:56 · 4 answers · asked by Anonymous

Find the exact value of the following under the given conditions:

cos a(alpha) = 8/17, a(alpha) lies in quadrant IV, and sin b(beta) = -1/2, b(beta) lies in quadrant III.

2007-11-30 17:06:51 · 1 answers · asked by ambriz_jesus4 1

Use the formula for the cosine of the difference of two angles. Verify the following identity:

cos a(alpha) – b(beta) / sin a(alpha) sin b(beta) = cot a(alpha) cot b(beta) + 1

2007-11-30 16:59:28 · 1 answers · asked by ambriz_jesus4 1

2x + 3y = 6
Solve for x

2007-11-30 16:50:52 · 5 answers · asked by Anonymous

A person measures the angle of depression from the top of the wall to a point on the ground. the point is located on the level ground 62 feet from the base of the wall and the angle of depression is 52 degrees. how high is the wall to the nearest foot.

i cant picture this question plz explain and show me how to do it plz.

2007-11-30 16:48:53 · 3 answers · asked by Anonymous

I need to solve the double integral of:

y * sqrt(1 + x + y) dxdy , where both limits of integration are 0 to 1

I cannot figure out how to do this by hand! I CANNOT use a calculator or computer program or anything like that.

2007-11-30 16:44:03 · 1 answers · asked by Professor 1

(x^n) / (7^n) with
inf
E
n=1

2007-11-30 16:32:08 · 1 answers · asked by swt16 1

2007-11-30 16:30:53 · 4 answers · asked by Luci W 1

If 0< theta <360*

x=theta

solve
sec^2(2x) + 2sec(2x) = 0

2007-11-30 16:13:25 · 4 answers · asked by undecided 1

Good luck.

2007-11-30 16:00:10 · 5 answers · asked by ESTEBAN 1

A ship on the ocean surface detects a sunken ship on the ocean floor at an angle of depression of 50 degrees. the distance between the ship on the surface and the sunken ship on the ocean floor is 200 meters.if the ocean floor is level in this area,how far abouve the ocean floor to the nearest meter ,is the ship on the surface?

i got tan50 200/1.191 and got x equals 168 M but i dont know if i am right,can you guys plz correct me , i m just getting the hang of this.

2007-11-30 15:45:37 · 4 answers · asked by Anonymous

if a and b are positive integers and (a^(1/2)b^(1/3))^6 = 432, what is the value of ab?

If someone could show me step by step how to solve this I'd appreciate it soo much

2007-11-30 15:41:43 · 6 answers · asked by Anonymous

Evaluate the indefinite integral:

⌠ cosx/ 5sinx +25
⌡

2007-11-30 14:42:39 · 2 answers · asked by Rachel 1

please help! i hate listing zeroes and stuff and i have actually tried but i dont get it

For the following polynomials list the possible rational zeros. (Do not find the zeros!)

P(x) = x^5 + 3x^3 + 2x - 6

P(x) = 3x^4 + x^3 + 2x^2 - 2

P(x) = 2x^5 + 3x^4 + 2x^2 - 2

2007-11-30 14:29:23 · 7 answers · asked by Zack A 1

Basically, demonstrate the existence of two infinite sets that cannot be placed into a one-to-one corrospondence with each other....

2007-11-30 14:12:04 · 7 answers · asked by Precious W 2

Does anyone know the period to this function...?
y=3cos(-theta/3)
or the asymptotes to this function:y=tan3/2 theta ?
please and thank you
it's trig... the formula to get the period one is 2pie/b if that helps

2007-11-30 14:03:45 · 1 answers · asked by Marybeth 1

Im a little confused as to how to find the answer. I am able to do it with only 2 numbers but the third number has throws me off.
What was the percent increase in the population in South America from 1900 to 2000?
1900-38,000,000,
1950-111,000,000,
2000-515,000,000

if it was only 2 say years 2000 and 1950 the equation would be
(515,000,000-111,000,000)/111,000000x100%
so what do I do when a third number is added ? does that make any sense ?

2007-11-30 13:59:19 · 5 answers · asked by ladybugg0829 2

On the moon the acceleration due to gravity is 5ft/sec^2. An astronaut jumps into the air with an intitial velocity of 10 ft/sec. How high does he go? How long is it before he comes back down?

2007-11-30 13:59:17 · 4 answers · asked by Anonymous

please view http://mathematics--question.blogspot.com/ for the full question and the diagram...thanks for helping me solving this maths problem

2007-11-30 13:45:27 · 1 answers · asked by kasturi s 1

and angles

2007-11-30 13:39:06 · 2 answers · asked by Ciavana 3

2007-11-30 13:37:06 · 1 answers · asked by truethirteen 2

2007-11-30 13:22:52 · 10 answers · asked by Anonymous

I'm not yet in calculus, but differentiating doesn't seem too hard (I can get down the very basics)...I was just wondering if someone would be able to explain how to find the vertex of a parabola using the derivative...I really hate using complete the square...it's time consuming and boring! Using another method would also be useful to double check my answer. Also, are there any other calculus tricks that are useful for simple applications (ex. simple functions, trig, etc.). Thank you in advance.

2007-11-30 13:22:11 · 5 answers · asked by HSR 2

2007-11-30 13:13:09 · 8 answers · asked by Sis F 6