Mathematics - 17 November 2007

2007-11-17 12:24:56 · 8 answers · asked by Anonymous

1. x^2-8x+16=0
2. 3u^2=-4u+15
3. 2x^2=200
4. 4(t+6)^2=160


please and thank u

2007-11-17 12:18:54 · 3 answers · asked by Anonymous

2007-11-17 12:18:23 · 7 answers · asked by ♥me 1

x^2+10x+24

2007-11-17 12:11:22 · 9 answers · asked by Chrisso 2

Given the two functions f and h such that f(x)=x^3 -4x^2+x+6 and h(x)= f(X)/(x-3) , for x is not equal 3 and P, for x=3
A) Find all zeros of the function f
B) Find the value of p so that the function h is continuous at x=3.

This is a tough problem, I couldn't find the zeros, I did many way to simplify it to find the zeros but nothing worked so anyone know how to do it, plz help me
C) Using the value of p found in (B), determine whether h is an even function.

2007-11-17 11:56:38 · 5 answers · asked by Kim M 2

What is "The answer to 2+2 times 10?"

This is not my homework but like i said first one to get it right gets Best answer! It is an easy was to get Best Answer

2007-11-17 11:42:55 · 13 answers · asked by Anonymous

http://img240.imageshack.us/img240/4206/711segmentsinacircle2ri5.jpg

2007-11-17 11:27:12 · 3 answers · asked by Anonymous

2007-11-17 11:18:18 · 5 answers · asked by Anonymous

I need to find an equation in the form H(x,y) = c that satisfies given trajectories

For example:
dx/dt = 2y , dy/dt = 8x
For these trajectories I can do dy/dx = 8x/2y and use separation of variables to obtain: 4x^2 - y^2 = c

But for the trajectories
dx/dt = x^2 - x + y , dy/dt = y - 2xy
are not separable, so how can I find H(x,y)

2007-11-17 11:14:22 · 3 answers · asked by Anonymous

Find the new balance for $1000 left on deposit for 6 months at 4% interest compounded quarterly.


Do you use a formula to find the answer? Please help!!!

2007-11-17 11:04:57 · 8 answers · asked by karazee! 2

find the equation of the line passing throught (3, -1) and perpendicular to y=x + 1.


put your answer in slope intercept form

2007-11-17 10:54:56 · 10 answers · asked by lady 1

I'm struggling on this but i get the feeling it's easier than i think.
The sequence is defined by:

x_n+1 = (x_n^5 + 2) / 6
where the initial value is 0.

and you need to show that

| x_n+1 - x_n |
after having shown that 0< x_n <1 (which i was able to do).

( by the way
can anyone help?

2007-11-17 10:52:43 · 2 answers · asked by mongrel73 1

I realise it's easy, I'm just checking I'm doing it right.

2007-11-17 10:52:37 · 5 answers · asked by Me 1

The manufactor will charge you a time fee of $1000 to produce the glasses with the Laurel Highlands Mustang printed on them. The manufacturer will sell each glass $1.15. Your torla on one glass would be $1001.15($1000+$1.15), for two glasses your cost would be $1002.30 ($1000+$2.30), and so on.

Your planning to sell them for $ 4.95 Each.

2007-11-17 10:30:45 · 4 answers · asked by Loreale 1

2007-11-17 10:27:36 · 11 answers · asked by Jairus N 1

2007-11-17 10:03:57 · 7 answers · asked by The Lone Trumpeter 2

soo how dus dis work?
its confusing

2x+5y=7
x+4y=2

help me please

2007-11-17 10:00:54 · 4 answers · asked by ninnis 1

2007-11-17 09:54:50 · 7 answers · asked by luckybob88 1

the equations is y=xe^x. i'm not sure if my 2nd derivative is right..& if it is....when you set it = to 0 ..lookssss extremely confusing. i'm not even sure if my f'(x) is right

f'(x)= e^x+xe^x
my f''(x) = e^x(xe^x)+e^x(e^x+xe^x)
so u're supposed to do?
e^x(xe^x)+e^x(e^x+xe^x)=0 ??
idk if anyone could help it would be greatly appreciated. this is the 1st problem of my hw lol ..i might have to post more if i don't get the other ones

y=x sqrt(9-x^2)
y=x^3(4-x)
y=x^1/3(x-4)
y=x^1/2(x+3)

i absolutely have no idea how to do these -_- if anyone could help me step by step?? >.<

2007-11-17 09:40:58 · 2 answers · asked by boom56 1

- what is the probability of flipping a coin and landing on tails three times in a row? I wasn't sure if it's 1/2 because its independant probability or if its 1/6 doing 1/2 times 1/2 times 1/2 three times?

2007-11-17 09:40:46 · 5 answers · asked by arwww x p 1

2007-11-17 09:38:11 · 1 answers · asked by Anonymous

2007-11-17 09:22:52 · 5 answers · asked by Paul G 1

how do you differentiate

y= log 5x ?

2007-11-17 09:16:30 · 2 answers · asked by Anonymous

How much would the total be if a jacket was $40 and there was a 10% off sale?

2007-11-17 09:10:42 · 5 answers · asked by Anonymous

This is an integral with 0 on the bottom of it and pi/4 on top just to make sure you understand... and it needs to be evalutated

2007-11-17 09:10:00 · 5 answers · asked by Greg M 1

Thanks!

2007-11-17 09:07:01 · 7 answers · asked by Anonymous

Explain your answer.

2007-11-17 09:05:20 · 5 answers · asked by Helen B 5

1. Six pears and three apples cost $3.90. Two pears and five apples cost $3.30. How much does one pear cost? Hint: You have two unknowns (variables), so you need two equations. Write one equation for each situation and solve the system of equations.

Let p = the cost of one pear

Let a = the cost of one apple

a. Write a system of equations that can be used to determine the cost of pears and apples.

b. Determine the cost of one pear and one apple. Use mathematics to explain how you determined your answer.


2. There were 1500 people at a high school football game. Student tickets were $2.00 and adult tickets were $3.50. The total receipts for the game were $3825. How many students bought tickets?

Let a = the number of adult tickets purchased.

Let s = the number of student tickets purchased.

a. Write a system of equations that can be used to determine the number of adult and student tickets purchased.

b. Determine the number of adults tickets sold and the number of student tickets sold. Use mathematics to explain how you determined your answer.


3. An airplane flew 4 hours with a 25 mph tail wind. The return trip against the same wind took 5 hours. Find the speed of the airplane in still air. This similar to the current problem as you have to consider the 25 mph tailwind and headwind.
Let r = the rate or speed of the airplane in still air.

Let d = the distance

a. Write a system of equations for the airplane. One equation will be for the outbound trip with tailwind of 25 mph. The second equation will be for the return trip with headwind of 25 mph.

b. Solve the system of equations for the speed of the airplane in still air.


4. Your family likes to go to baseball games. At one game your family bought 5 soft drinks and 5 hot dogs for $22.25. At the next game your family attended they bought 4 soft drinks and 3 hot dogs for $14.50. What is the cost of one soft drink and one hot dog?

Let s = the cost of one soft drink

Let h = the cost of one hot dog

a. Write a system of equations modeling the situation described above.

b. Solve the system for the cost of one soft drink + one hot dog. (You will have to add your solutions together for this one.)


5. Suppose you just have just enough dimes and quarters to pay for a loaf of bread and quart of milk, which cost $3.45. You have a total of 15 dimes and quarters.

Let d = the number of dimes you have.

Let q = the number of quarters you have.

a. Write a system of equations that models the information given above.

b. Solve the system for the number of dimes and quarters you have. You may want to solve this by graphing.

2007-11-17 08:59:45 · 2 answers · asked by Ashley A 1

$9000 has been invested in an account paying 7.87% annually, compounded monthly.

How long will it take for the investment to exceed 12031?

Your answer should be accurate to one decimal place.

Approximately ________years

2007-11-17 08:57:47 · 2 answers · asked by lauren m 1

At this moment, a bacteria colony has a volume of 9.3 cubic centimeters. The bacteria colony is growing continuously at a daily rate of 2.3%. At this rate, how long will it be before the bacteria colony outgrows the 46.5 cubic centimter container in which it is stored? Express your answer accurate to 1 decimal place.
_________ hours

2007-11-17 08:56:16 · 3 answers · asked by lauren m 1