Mathematics - 2 December 2007

i got 3/2 as answer but apparently its not correct. Thanks!

2007-12-02 05:03:34 · 3 answers · asked by Jackie S 1

Determine if each equation given is a function. If it is or is not a function, explain the reason why. How do I know if an equation is a function or not?

(1) y = + or - sqrt{1 - 2x}

(2) y = (3x - 1)/(x + 2)

2007-12-02 05:03:00 · 3 answers · asked by journey 1

This is for a college class assignment that is due on Tuesday (12/4). What I have worked out so far is this:
Volume = 4/3 pi r^3; If the moon's diameter is n, then it's r = 1/2 n. Since the earth is 4 x this, then the earth's r = 2n.......right?

I'm getting for the moon: V= 4/3 pi (1/2n)^3
For the earth: V= 4/3 pi (2n)^3

How do you figure ratio.....if I've even done this much right?

2007-12-02 05:02:23 · 6 answers · asked by atalco3 2

how do i find the equation of
a) a line
b)a prabola
c) a circle
from a graph
answer in standard form!
(no specific question just how to ...i kinda forgot...with examples if posible THANK YOU)

2007-12-02 05:01:56 · 1 answers · asked by ? 3

A person 6 feet tall walks away form a streetlight at the rate of 5ft/s. If the light is 18 feet above ground level, how fast is the person's shadow lengthening?

2007-12-02 05:00:43 · 1 answers · asked by MaKeShIfT 2

Determine if each equation given is a function. If it is or is not a function, explain the reason why. How do I know if an equation is a function or not?

(1) y = |x| + 4

(2) y = (1/x)

2007-12-02 05:00:42 · 1 answers · asked by journey 1

Can You Help Me With My Maths Homework Please

1) An Antique Clock Cost £540. Its Increased By 18% What Is The Total Now ?


2)£600 is put in the bank. after a year the money has increased by 8%. How Much is in the bank?

3) second hand car cost £2400. The price falls by 45% when it is sold again. how much is it sold for now ?


I Hope You can help me thanks

2007-12-02 04:59:51 · 3 answers · asked by twocoats 1

A ferris wheel with a radius of 20 m rotates once every 120s. At time t = 0 passengers get on at the lowest point of its rotation which is 2m above the ground. Determine a sine or cosine function that gives the passenger's height (h) meters, above the ground as a function of time (t) in seconds

2007-12-02 04:58:45 · 1 answers · asked by Anonymous

i should know this, but i forgot what it is:

what is the antiderivative of e^-x dx?

2007-12-02 04:55:21 · 6 answers · asked by cornz000 1

what is the fewest number of coins you would need to pay a charge of any amount less than 26 cents with exact change?

List the coins.. {such as nickels, dimes, pennies, etc...}

2007-12-02 04:44:30 · 5 answers · asked by Manoura 2

Use either the comparison test or ratio test to determine which of the following series converge or diverge

k=1∑∞ (3k^2)-3 / (k^5)+1

k=1∑∞ (k^3/4^k)

k=1∑∞ (1/log(k+1))

k=1∑∞ (1/k + log(k))

2007-12-02 04:40:47 · 3 answers · asked by Anonymous

i want to know , while calculating problems , i get into equations like when x=2, x=3 ....i got to solve cos(x) or sin(x).
so how do i solve that ?

2007-12-02 04:40:36 · 6 answers · asked by sri_july27 2

if y = 24x + 3x^2 - x^3, what is the relative maximum value of y?

so far I've got:
1) derivative
2) derivative = 0, solve
3) quadratic formula
4) bang head on desk because it still didn't work.

please help =.O

2007-12-02 04:38:16 · 4 answers · asked by Fundamenta- list Militant Atheist 5

2007-12-02 04:36:57 · 5 answers · asked by Anonymous

please tell me how u did this

2007-12-02 04:29:03 · 5 answers · asked by Anonymous

x^2-2x-15=0

2007-12-02 04:26:20 · 6 answers · asked by Anonymous

The circular blade on a saw has a diameter of 7.5 inches and rotates at 2400 revolutions per minute.

A.) Find the angular speed in radians per second.
B.) Find the linear speed in of the saw teeth (in feet per second) as they contact the wood being cut.

2007-12-02 04:19:57 · 3 answers · asked by Anonymous

Do a complete analysis of the percent of seeds infected by the beetle. Include a 90% confidence interval for the mean percent infected in the population of all velvetleaf plants.
Seeds Infected Percent 2450 2504 2114 1110 2137 135 101 76 24 121
5.5 4.0 3.6 2.2 5.7
8015 1623 1531 2008 1716 721 863 1136 2819
189 31 44 73 12 27 40 41 79
2.4 1.9 2.9 3.6 0.7 3.7 4.6 3.6 2.8

1911 2101 1051 218 1711 164 2228 363 5973 1050
82 85 42 0 64 7 156 31 240 91
4.3 4.0 4.0 0.0 3.7 4.3 7.0 8.5 4.0 8.7

1961 1809 130 880
137 92 5 23
7.0 5.1 3.8 2.6

2007-12-02 04:18:57 · 2 answers · asked by adrianterrellhogan 1

f(0)=4
f(6)=0
f(x)<0 if x<2 or x>4
f '(2) does not exist
f ' (4)=0
f ' (x)>0 if 2 f " (x)<0 if x can not equal 2

2007-12-02 04:16:45 · 2 answers · asked by issy m 1

im supposed to analyze the zeroes and use decartes rule of signs to find all the possibilities??

P(x) = -5x^4 + x^3 + 2x^2 - 1

P(x) = 2x^5 + 7x^3 + 6x^2 - 2

2007-12-02 04:11:33 · 8 answers · asked by Zack A 1

2007-12-02 04:11:20 · 1 answers · asked by Nicholas 1

ok if if acceleration is 1 m/s squared and mass is 0.1 kg what it force? and if acceleration is 1 m/s squared and force is 0.2 N what is mass??

please show how you got it!

2007-12-02 04:10:09 · 4 answers · asked by heyjude 3

A triangle with the following vertices: (-5, 7), (5, 4), (7, -8). I know this is extremely easy, but I simply forgot the procedure. Help?

2007-12-02 04:00:51 · 3 answers · asked by wrongnumber 1

I do not understand how to find the b value....So far I have a center of (4, -2) a=6... please help.

2007-12-02 03:57:12 · 1 answers · asked by jinaan 1

real rate of interest = effective rate of interest - inflation rate

inflation rate = 31%

rate of interest = 25.6%

effective rate of interest = (1 + r/n)^n - 1

= (1 + (.256/12)^12 = 28.83%

real rate of interest = 28.83 - 31 = - 2.17%

would that be correct?

2007-12-02 03:57:02 · 1 answers · asked by Mathema-what?! 1

1) You are ordering t-shirts from online which cost $7.00 each. Your shipping cost is $4.50 and your purchase total is $25.50. Let t be the number of t-shirts ordered. Which equation models this situation?

2) How many t-shirts were ordered in question #1?

3) Solve the equation 4 - 2(x - 7) = -12 for x.

4) Solve the equation 3(2x + 1) = 2x - 9 for x

5) One-on-One Gym charges $50 initiation fee and $30 per month. Really-Fit Gym charges $75 initiation fee and $25 per month. For what number of months (m) is the cost the same using the equation 50+30m = 75+25m?

2007-12-02 03:55:17 · 7 answers · asked by Anonymous

lim x^2+3x-5
x--->2

lim 2x+5/x-3
x--->3

lim x^2-x-6/x-3
x--->3

2007-12-02 03:46:47 · 3 answers · asked by 3Sigma 1

1) Solve the equation 23 = h - 52 for h.

2) A mother weighs her baby by holding the baby and stepping on a scale. Their combined weight is 143 pounds and the mother's weight is 128 pounds. How much does the baby weigh? Let w be the baby's weight. Which equation can be used to find the baby's weight?

3) Solve the equation -9 = -a + 15 for a

2007-12-02 03:39:39 · 4 answers · asked by Anonymous

I understand that "To find the rise over run for any degree value, you multiply 12 * tan(x) where x is the degrees." but I don't know how to calculate the run over rise. Any assistance would be greatly appreciated to compensate for my poor math ability.

2007-12-02 03:32:10 · 4 answers · asked by Philippa C 1

A fence 3 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

2007-12-02 02:59:55 · 4 answers · asked by sporty 1