Mathematics - 23 September 2007

Hi everyone,

I have the problem y = 2x^2 -4x -9, and have to find the x-intercept.

2007-09-23 07:20:31 · 4 answers · asked by Anonymous

1. In Taxi cab geometry how is distance measured?
2. solve for pi in pi*d
11. Compute the circumference of the circle x2+y2=9 giving the exact value and the value to three significant digits
12. What is the value of pi you used to give the approximate value
14. find the circumference of the taxi circle (x2+y2=9)
15. Find the value of pi in taxi cab geometry
16. Will the value of pi always be the same value you computed in #15? Dont guess use at least one equation with a different radius and another equation with a different center and show work in your journal!

2007-09-23 07:13:53 · 2 answers · asked by Zoology 1

i mean that in math there is a term that is ''real numbers'' but i dont know what it means.

2007-09-23 07:13:01 · 9 answers · asked by Anonymous

A car in a roller coaster moves along a track. In the time interval from t=0 to t=4 s, where A is a positive dimensionless constant.

v = sqrt[(A^2 + (3At^2 + 12At)^2]

The roller coaster is designed according to safety regulations that prohibit the speed of the car from exceeding 20 m/s . Find the maximum value of A allowed by these regulations.

2007-09-23 07:04:08 · 1 answers · asked by Tommy 2

2007-09-23 07:00:42 · 8 answers · asked by tablesawtom 2

Differentiate.

z = w^(3/2)(w + ce^w)
z'(w)= ?

w is the variable

2007-09-23 06:59:54 · 2 answers · asked by Anonymous

how to I even begin to factor this equation?? Any help would be appreciated.


X^5 - X^3 + 4X^2 - 4


Thanks.

2007-09-23 06:55:26 · 4 answers · asked by Adam W 2

i typed in the data on 2 columns (L1 and L2) so how do i find the slope for this data then find the line of best fit using the graphing calcuator.

2007-09-23 06:54:29 · 2 answers · asked by Anonymous

how do i go about proving the following:
let n be a positive integer. prove that n and (n+1) must be relatively prime. help!

2007-09-23 06:53:04 · 2 answers · asked by Anonymous

how do you solve a problem in y=mx+b form

2007-09-23 06:50:48 · 1 answers · asked by Anonymous

2007-09-23 06:50:45 · 5 answers · asked by Colette B 1

I have two equations both functions of t(time)

y(t) = -4.9x^2 + 20x

x(t) = 10x

I want to make y a function of x. y(x).

I've thought about it and just keep gettin y(x) = -0.49x + 2 I know it's not right. The function will be a parabola. Please don't tell me to make a plot graph. I don't do graphs. They're so innacurate.

I know there is a way to do it mathematically. I just need some help.

2007-09-23 06:43:25 · 2 answers · asked by Snipe_AT 2

I'm fine with basic inverse functions but I am still having trouble with some ie e^(2-sqrt(x)). Working backwards I end up with ln2+x^2 but I know thats incorrect. Please advise, thanks

2007-09-23 06:42:30 · 3 answers · asked by John Avry 2

The set of points on the plane with integer coordinates over the filed of real numbers do not form a vector space because while there is closure for vector addition, there is no closure for scalar multiplication.
(1/2) • (1,3) = (1/2, 3/2)
Why can't you define the scalars as a set of integers?

2007-09-23 06:41:07 · 1 answers · asked by ? 3

how do i go about proving the following:
let n be a positive integer. prove that n and (n+1) must be relatively prime. help!

2007-09-23 06:39:46 · 4 answers · asked by Anonymous

Its in my mathbook:

On many graphing calculators /x/ (the slanted lines are suppose to be absolute values signs) is denoted by ABS(x). use a graphing calculator to graph the absolute value function.
then use the drace feature TO FIND THE CORRESPONDING X VALUES FOR THE GIVEN Y VALUES.


i dont understand the caps part.

heres on of the qustions y=/x+14/ ; y=9


i know how to graph the first equation and then press trace on my graphing calculator but then wuts up with the nine? do i have to do any other math?

2007-09-23 06:37:45 · 2 answers · asked by مدينا Medina ☪ 6

y=2cos1/2 (x- π)-2

so far i have...
period=2 π
horizontal shift= π

i need to find
Amplitude (A)
Veritical Shift (VS)

2007-09-23 06:33:54 · 3 answers · asked by Alisha H 1

ok i have no idea how to do ym math homework. there are 5 questions but if someone explains the first to me it will probably be all that i need.:

In a dance class 2/7 of the men are married to 1/5 of the women. What fraction of the dance class is women.

i kinda had somthing goin but am completly confused. Please help somebody =]

2007-09-23 06:33:04 · 3 answers · asked by Allie B. 2

2007-09-23 06:15:49 · 7 answers · asked by G 1

How do I get from x(x+1)=42 to x=6
I'm really stumped. I worked out the answer but I cant understand how to get the answer through solving the equation...

2007-09-23 06:13:23 · 8 answers · asked by Anonymous

Hi, i found a factorization example on a book but i didn't know how they got *

A=10x^2-15x
A=5x*2x-5x*3
A=5x(2x-3)

2007-09-23 06:11:19 · 6 answers · asked by Anonymous

2007-09-23 06:06:03 · 3 answers · asked by lisa S 1

2007-09-23 06:03:13 · 8 answers · asked by Anonymous

The length of a flag must be 1.5 times the width, and the area of the flag must be between 60 square inches and 300 square inches. What are the possible whole-number dimensions for the flags?

2007-09-23 05:59:02 · 2 answers · asked by The One 1

Want to understand the work involved

2007-09-23 05:57:23 · 2 answers · asked by Robert 1

2007-09-23 05:47:06 · 3 answers · asked by nothingspecial 1

2007-09-23 05:26:45 · 3 answers · asked by la_troublez_26 1

Why AM station's decimal number frequency are always
ODD Numbers?

2007-09-23 05:13:18 · 2 answers · asked by colin 2

The 4th term of a sequence is 4 and the 6th term is 6/ Every term after the 2nd is the sum of the 2 preceding terms. what is the 8th term of the sequence?

PLEASE HELP AND SHOW/EXPLAIN how to get answer
Thanks!

2007-09-23 05:06:15 · 1 answers · asked by ~USA~ 2

A fast-food reteraunt is holdinga contest in which the grand prize is a new sports car. Each customer is given a game card with their order. The contest rules state the odds of winning thr grand prize are 1:1,000,000.

A. For any randomly-selected game card, what is the probability that it is the winning game card for the grand prize?

B. Do your odds of winning the grand prize increase significantly if you have several game cards? Can you Explain!!?

2007-09-23 04:09:46 · 6 answers · asked by Anonymous