Mathematics - 17 October 2007

2007-10-17 23:55:56 · 5 answers · asked by abed ulwahab t 1

2007-10-17 23:47:15 · 3 answers · asked by jerry till 1

2007-10-17 23:46:56 · 3 answers · asked by chaitra d 1

sq rt ( 5u+10) = sq rt(9u+7)


solve for u


THANKS! =)

2007-10-17 23:42:09 · 8 answers · asked by MTak 2

Function y=x^2 e^-x, how to find growth and decrease intervals when function is y=x^2 e^-x?
Thank you

2007-10-17 23:41:07 · 1 answers · asked by aurelijad 1

4y^2+5=12y


solve for y, thanks!

2007-10-17 23:26:39 · 11 answers · asked by MTak 2

How do I go about solving these questions?

Solve:

Question 1:
4x^2 – 28x + 40 = 0

Question 2:
12y^2 + 35y + 25 = 0

Question 3:
x(x – 2) = 8

Question 4:
45n^2 + 21n = 0

2007-10-17 23:24:07 · 3 answers · asked by Anonymous

Let f(x)= 2x2-x+1 (2x is squared)

Find the difference quotient f(x+h) - f(x) / h , for each function

2007-10-17 23:19:38 · 2 answers · asked by Anonymous

Y~unif(0,1). Find a function phi(Y) such that X=phi(Y) has density f given by f(x) = 2x, whenever x is in [0,1], and f(x)=0 elsewhere.

2007-10-17 22:56:47 · 2 answers · asked by bloopbloop 2

5/a-5 + 3/5-a = ?

5/a-5 and 3/5-a are separate terms.

Is it equal to 2/a-5?

2007-10-17 22:46:34 · 7 answers · asked by Hooyah!df 2

How would I calculate the maximum rate of change of f at the point (1,-2,-3) and the direction that it occurs of the function:

f(x,y,z)=ln(x*(y^2)*(z^3))

First person with correct answer and work gets 10 pts!

2007-10-17 22:41:54 · 1 answers · asked by sam b 5

2007-10-17 22:10:47 · 12 answers · asked by muhammad razman r 1

A bicycle rider travels 18 miles in the same amount of time that it takes a jogger to travel 10 miles. If the bicyclist goes 9.6 miles per hour faster than the jogger, how fast does each person travel?


show steps so i can understand

2007-10-17 22:01:14 · 9 answers · asked by Anonymous

The sum of the squares of three consecutive odd integers is 371. Find the integers. Find k so that (3k+1)x squared-(2k-1)x+5=0 has one root equal to 1.

2007-10-17 22:00:06 · 1 answers · asked by Anonymous

Solve the differential equation dy/dx=y^(1/2), y(0)=0, 0<=x<=2 using ode45 and
dfield. What happens if y(0) = epsilon
(a very small number such as 10^(-8) ) is used as the
initial condition? Why? Provide the solution and two plots; one from ode45 and
one from dfield.

2007-10-17 21:55:07 · 1 answers · asked by Max_ccc 2

joe has received 11% increase in salary. His new weekly earnings are $222. What was his prrevious weekly salary?

$197.58

2007-10-17 21:25:56 · 11 answers · asked by fana 1

Suppose f has a continuous derivative whose values are given in the following table.

a) Estimate the x-coordinates of critical points of f for 0(less than or equal to) x(less than or equal to)10.

b) For each critical point, indicate if it is a local maximum of f, local minimum, or neither.

x: 0, 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10
f'(x): 5, 2, 1, -2, -5, -3, -1, 2, 3, 1, -1

2007-10-17 21:11:44 · 1 answers · asked by i<3WL 2

With respect to the origin O, the position vectors of points A, B and C are (2, 3), (4, -2) and (-3, -3) respectively.

(i) A point E (-2, p) is such that 2 |CE| = |AB|. Find the possible values of p.
Ans: - 5 1/2 or -1/2

(ii) Find the coordinates of the point Q if 2 CQ = BA + 1/2 AC.
Ans: (-5 1/4, -2)

Please help by showing workings...Any help will be greatly appreciated!

2007-10-17 21:11:02 · 1 answers · asked by Anonymous

sec^2 x as in sec power of 2 x..need to prove it ASAP.And do please provide me with the complete solution,pls..

2007-10-17 20:54:10 · 1 answers · asked by j.anaike 1

find the corresponding point of the graph of the function y=-8f(x -1)+1

2007-10-17 20:17:00 · 1 answers · asked by Anonymous

2007-10-17 19:39:04 · 5 answers · asked by Anonymous

2007-10-17 19:30:38 · 10 answers · asked by TRISTON 4

The floor plan of an apartment is drawn to a scale of 1 : n.

(a) The master bedroom measures 1.8cm by 1.5cm in the floor plan. If the actual area of the master bedroom is 24.3cm^2, find the value of n.

ans: 300

show workings pls..

2007-10-17 19:28:37 · 3 answers · asked by Anonymous

A company owns 15 machines that produce pens. When all machines are operating, 54000 pens are produced in 6 hours.
On a particular day, 69000 pens must be produced but 7 of the machines are not working.
Assuming the rest of the machines continue to work at the same rate, how many hours must they operate in order to meet the target?

Answer is 14 3/8

Please show workings..cos this question is very confusing...

2007-10-17 19:23:50 · 3 answers · asked by Anonymous

What is the exact number?? I totally forgot..

2007-10-17 19:10:01 · 8 answers · asked by Anonymous

2√x - 3 √y = 5
3√x + 5√y = 17

Ans: x = 16, y = 1

Please show your workings clearly..thank

2007-10-17 19:07:17 · 7 answers · asked by Anonymous

not sure if this apply to this but
U x v = 1
v squared = 2

projv u = 1/2 (0, 1, 1)
= (0, .5, .5 )

u - projvu = (1, 0, 1) - (0, .5, .5)
= 1 , -1/2, 1/2

2007-10-17 18:59:21 · 2 answers · asked by Anonymous

A chemist has one solution containing a 16% concentration of acid and a second solution containing a 26% concentration of acid. How many mL of each should be mixed in order to obtain 30mL of a solution containing an 18% concentration of acid?

2007-10-17 18:43:11 · 3 answers · asked by Anonymous

SAT math problem and i have no idea how to solve it.

2007-10-17 18:38:05 · 2 answers · asked by Anonymous

Frank weighs twice as much as George, but 30 pounds less than Harry. If Harry weighs 110 pounds more than George, how much does Harry weigh?

I need someone to explain this to me.. it was a part of SAT prep and I have no idea how to solve it

2007-10-17 18:35:21 · 17 answers · asked by Anonymous