Mathematics - 28 July 2007

Write a quadratic equation for each of the following.

1. The area of an isosceles right triangle in terms of its legs.
2. The lateral area of a right circular cylinder whose height is equal to the radius.

thanks

2007-07-28 23:47:49 · 3 answers · asked by xah8 1

They have been used to study probability so I thought you maths folks would know.

You put a marble in the top and it can either fall left or right. If the marble went right it can fall right again or fall back to the centre. If, however it fell left first time it can now fall further to the left or fall back to the centre. And so it goes on.

After several layers the marbles are collected and a probability distribution can be observed.

The reason I am so interested to know is because some scientist used one to study the effect of experimentor bias on out come.

He asked subjects to will the ball to the left or right and remarkably the distribution did indeed go where they willed it to.

2007-07-28 23:36:12 · 2 answers · asked by tuthutop 2

a. imaginary
b. real,irrational,unequal
c. real,rational,unequal
d. real,rational,equal

2007-07-28 22:17:13 · 7 answers · asked by Hybrid Angel 2

Is there a formula for this question? : determine how much money must be invested to produce $2120 simple interest over a period of 4 years at 7.65% p.a
thanks!

2007-07-28 22:01:52 · 5 answers · asked by little.clown 2

a. none
b. (2,3)
c. (-2,-1,0,1,2,3)
d. (-2,-1,0,1)

Please tell me the correct answer of the choices
and if you can share your solution pls do share it...
I really nid it

2007-07-28 21:58:03 · 4 answers · asked by Hybrid Angel 2

Determine the 1st derivative of g(x) = 2xe^-x2.
Find the maximum value of the function g(x) = 2xe^-x2.
Also note that e^a is always positive for all a

2007-07-28 21:53:42 · 3 answers · asked by missyvic 1

If something moves 100 feet in 4.8 seconds; how many MPH is it going

2007-07-28 21:45:26 · 6 answers · asked by Anonymous

Please Solve for X:
2^2x - 2^(x+1) - 8 = 0

2007-07-28 21:37:23 · 5 answers · asked by im_n0t 1

2007-07-28 21:06:57 · 10 answers · asked by iSmile 2

2007-07-28 20:57:20 · 3 answers · asked by nix** 1

you have to prove it it is maths trignomatory question 2(Square)

2007-07-28 20:24:50 · 3 answers · asked by aryabhatt 1

a) 12a^7/8 / 3a^1/4
b) (a^2/3 b^5/6)(a^1/2 b) / (ab)^1/3
c) (a^1/4 b^3)^1/2 / (a^1/3 b^1/4)^-5
d) (a^1/2 + a^1/2)(a^1/2 - a^1/2)

2007-07-28 20:01:48 · 3 answers · asked by Anonymous

Okay, im making a stage design model for school.
The actual stage is 12m by 18m (40 x 60 ft)
I need to make my model in porportion with the measurements...
The material i have for the base is 134cm by 83cm.
The material is easy to cut so i can cut it smaller if needed.
Can you help me with this, i hate measurement/ratios!

2007-07-28 18:58:31 · 4 answers · asked by Anonymous

1.) cot Θ + tan Θ = csc^2 Θ + sec^2 Θ / csc Θ sec Θ

that is: cot Θ + tan Θ = csc^2 Θ + sec^2 Θ (over) csc Θ sec Θ

2.) 1-2 cos Θ / sin Θ cos Θ = tan Θ - cot Θ

that is: 1-2 cos Θ (over) sin Θ cos Θ = tan Θ - cot Θ

2007-07-28 18:57:17 · 2 answers · asked by Hansel and G 1

The density function of X is given by

f(x) = a + bx^2 if 0 ≤ x ≤ 1
f(x) = 0 otherwise

If the expectation of X is E(X) = 5, find a and b.
a = _______
b = _______

2007-07-28 18:55:04 · 4 answers · asked by Anonymous

2x^2+x-1>0

2007-07-28 18:54:18 · 2 answers · asked by martinez_bonnie1 1

2007-07-28 18:38:15 · 8 answers · asked by Shaun R 4

please help! I'm an LOA student this semester because of an operation. but i'm still trying to study so my brain would be ready when i come back to school..

WORK PROBLEM:
Find four numbers such that the sum of the first, third, and fourth exceeds the second by 8; the sum of the squares of the first and the second exceeds the sum of the squares of the third and fourth by 36; the sum of the products of the first and second, third and fourth is 42 (meaning: [(1st x 2nd) + (3rd x 4th) = 42]); the cube of the first equals the sum of the cubes of the second, third, and fourth.

thanks in advance!

2007-07-28 18:24:10 · 2 answers · asked by Anonymous

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y = x^2, y = 0, x = 0; x = 3, about the y-axis

2007-07-28 18:16:38 · 3 answers · asked by Anonymous

2007-07-28 18:03:14 · 6 answers · asked by missprissy1004 2

2007-07-28 17:41:00 · 5 answers · asked by Shaun R 4

what is the equation of the line that passes through the points (3, -2) and (7,-2). its the last question and i have no clue how to do it.

2007-07-28 17:35:21 · 8 answers · asked by ilovehur42 2

Solve equation

4y - 3x =5
(3/4)x = y - 4

2007-07-28 16:56:05 · 13 answers · asked by MizzKin 1

2007-07-28 16:55:47 · 6 answers · asked by Anonymous

i would i change these three expression into fractions

6a-4
------- -3
7a-5


y-1- 5
--------
y+3

y+ 2y^3
------------
x^3-y^3

2007-07-28 15:11:20 · 2 answers · asked by Anonymous

2007-07-28 15:06:55 · 5 answers · asked by mztana820 1

Do you move the decimal to the left or right? Can you show me how to do this problem...step by step? Thanks

2007-07-28 14:55:51 · 7 answers · asked by christopher G 1

2007-07-28 14:16:33 · 4 answers · asked by dharmedo 1

2007-07-28 14:00:09 · 8 answers · asked by mztana820 1

*PLS HELP* Hi, i need help in solving this simultaneous equation using the substitution method. This is my example question and i have many more, but i am hoping that this question solved with steps to tell me what you did will allow me to complete my assignment. PLS HELP REMEMBER KARMA

2007-07-28 13:43:56 · 9 answers · asked by Anonymous