Mathematics - 13 December 2007

..the path followed by a - 'follower' - riding on a square cam against 'time'?
And on a cam the shape of an eccentric - or is it 'accentric' circle, where the wobble provides the 'change'?
Could you derive a formula for the relationship b/w the variables.. and would the formula be 'linear' type equation for ex.1 and a circle-type equation for ex.2 - at first sight?
Something is rhythmically changing in both instances,but what? ( I made up this question myself, so eagerly await your insightful responses..)

2007-12-13 15:14:02 · 1 answers · asked by c0cky 5

if y= Ax^2+Bx+C is a quadratic function can someone explain why y= x^2 is also considered one as well since the Bx+C is missing.

2007-12-13 15:04:02 · 5 answers · asked by rusalka 4

2007-12-13 14:41:09 · 9 answers · asked by LAURA E 1

2007-12-13 14:36:17 · 1 answers · asked by derrim2000 1

the sum of 3 numbers is 6. The 3rd number is the sum of the first and the second numbe. the first number is one more than the third number. Find the 3 numbers

2007-12-13 14:28:34 · 7 answers · asked by vegasbrother98 3

2007-12-13 14:20:45 · 4 answers · asked by derrim2000 1

I'm doing a math proeject and i need some help please.

2007-12-13 14:19:34 · 21 answers · asked by killak00_8 1

Deck= 52 cards

2007-12-13 14:15:01 · 17 answers · asked by twinkle 1

[(5x+2)/(x^2-81)] - [(4x-7)/(x^2-81)]


Please help! any help would be appreciated!

2007-12-13 14:13:36 · 6 answers · asked by alex 1

2007-12-13 14:13:00 · 2 answers · asked by No Name 1

a. 3x2(y + 3x)(y – 3x)

b. 3x(y + 3x)(y + 3x)

c. 3x(y – x)(y – x)

d. 3x(y + 3x)(y – 3x)

2007-12-13 14:11:48 · 6 answers · asked by Jazz 2

in math i mean
i know they created geometry and trig
did they create scientific observations?

2007-12-13 14:07:54 · 1 answers · asked by Sydney 3

2007-12-13 14:03:23 · 11 answers · asked by Anonymous

2007-12-13 13:45:25 · 15 answers · asked by John S 1

in a factory,watse liquid is poured into cylindrical drums. The area of the base of each drum is 2000cm squared and the height is 90cm.
Calculate
(a)the volume of each drum giving your answer in cubic meters
(b) when full,the drums are emptied into a tank.Both the base of the tank,DCGH and its top,ABFE,are horizontal rectangles.Each vertical sides ABCD and EFGH is a trapezium
(i)Find the area of the trapezium ABCD
(ii)the volume of the tank
(c)how many full drums of watse can be emptied into the tank?

2007-12-13 13:44:03 · 1 answers · asked by baby 1

Find the mass that remains after T years.

2007-12-13 13:37:38 · 0 answers · asked by power03stroke 1

I am having trouble with a binomial expansion. I need to expand the following function:

1/(1+sin^3 (x) )^2

How do I do this with a trig function raised to the third power?

2007-12-13 13:35:18 · 1 answers · asked by Nate-dawg 2

2007-12-13 13:34:16 · 1 answers · asked by mike m 1

2007-12-13 13:32:15 · 6 answers · asked by power03stroke 1

i dont know what the primary and secondary equations are... i know the primary is the one being maxed or minned... but its still confusing...

A rancher has 200 feet of fencing with which to enclose two adjacent rectangular corrals. What dimensions should be used so that the enclosed area will be a maximum?

primary (i think): xy=a
secondary (maybe): 2xy = 200

2007-12-13 13:16:47 · 1 answers · asked by Anonymous

A cafe can only produce a total of 500 teas and cakes daily, and can only make less than 150 cakes and 450 teas each day. The profit earned on tea is 50 cent and the profit from the sale of a cake is 80 cent. How many teas and cakes should be brewed and baked to maximize the cafe's profit?

x= teas per day
y= cakes per day
p= 0.5x + 0.8y
*<= means less than and equal to
0 <= x <= 450
0 <= y <= 150
x +y <= 500
Is this right? And if so..

1)Can someone draw the graph and show me a link,
2)List the coordinate of extreme points,
3)How many of teas and cakes will bring the greatest profit?

Thank you!!

2007-12-13 13:15:06 · 1 answers · asked by Sally Park 2

I don't understand this could you explain how to plot
r=2+sin(theta)

and tell which of these points lie on the graph (2,0)
(5/2&pi/3) (5/2&pi/6) (3,&pi/2) (3,0)

2007-12-13 13:11:59 · 1 answers · asked by Ciavana 3

The numbers on a raffle ticket have three digits. The first digit cannot be zero.

a) What is the probability of ticket number 917 winning the grand prize?

b) What is the probability of a ticket with the numeral 3 as the second digit winning the grand prize? The first digit can still not be zero.

2007-12-13 13:07:24 · 1 answers · asked by (: Muffin Man :) 2

The problem only gives the information about f.
(i) f(0)=2
(ii) f'(x)>0 for all x
(iii) The graph of f is concave up for all x>0 and concave down for all x<0
-Let f be the function defined by g(x) = f(x^2)

1. Find g(0)
- I am stuck from setting the eq to be g(0) = f(0^2)

2. Find the x coordinate of all minimum points of g.
- minimum ts.. exist when g' = zero or und.. and changes from negative to positive, but i don't know what g is..!!
3. Where is the graph of g concave up?
- That's when g' is increasing and g''>0, but I have no idea how to derive function g out of information of f.

2007-12-13 12:56:52 · 1 answers · asked by leonardo 1

I am working on a problem in which I need to calculate a 97% confidence interval.

This would make my alpha=.03
alpha/2=.015

However, .015 is not on my t-distribution chart! I don't know what to do!! Anyone know??

2007-12-13 12:56:23 · 4 answers · asked by Anonymous

2007-12-13 12:53:58 · 5 answers · asked by Anonymous

2007-12-13 12:44:48 · 1 answers · asked by *Roar* 2

A piggy bank contains five "loonies" and eight "toonies." It is shaken until two coins drop out.

a) What is the probability that two loonies will fall out?

b) What is the probability that two toonies will fall out?

c) What is the probability that one of each type of coin will fall out?

2007-12-13 12:36:20 · 7 answers · asked by (: Muffin Man :) 2

2007-12-13 12:30:25 · 2 answers · asked by Madeline H 2

Nine people try out for nine positions on a baseball team. The positions are filled by selecting players at random. Assume that all players are equally qualified for any position.

a) In how many ways can the positions be filled?

b) What is the probability that Duffy will be the pitcher?

c) What is the probability that David, George, or Duffy will play first base?

d) What is the probability that David, George, or Duffy will play first base and Eleanor or Georgina will be pitcher?

2007-12-13 12:27:05 · 8 answers · asked by (: Muffin Man :) 2