Mathematics - 19 September 2007

In a 30% off sale, you pay $35.00 for an article. What is its original price ?


...well, i know that the original price = x

2007-09-19 08:35:54 · 6 answers · asked by JuJu Beanz 1

2007-09-19 08:34:04 · 5 answers · asked by dezi2020 1

2007-09-19 08:13:14 · 9 answers · asked by starlightstarry 1

1)5x^2 + 5x + 11

2)4x^2 + 7x -2

2007-09-19 08:00:42 · 5 answers · asked by Anonymous

hey how do you solve this? You have to use substitution..

2007-09-19 08:00:33 · 5 answers · asked by Anonymous

Please tell me how to calculate the mean radius of a cylinder whose radius and height are known.

an example you can use to try this yourself is radius=10 height=20 and the mean radius is 11.32.

2007-09-19 07:53:25 · 2 answers · asked by Anonymous

1)Sqrt of 56x^5y^6 over 2y^4


2)7sqrt sign3+sqrt sign 6
over
sqrt sign 6+sqrt sign 3

thanks for the help!

2007-09-19 07:40:25 · 1 answers · asked by Duckie 26 2

are these values qualitative or quantitative?

1. measurements on the richter scale
2. area code
3. grade in school (ex. 4th grade)

2007-09-19 07:28:57 · 8 answers · asked by Bob 2

f(X) = (2X^2 + 18 + X ) / X

the critical point is the derivative at 0, which is (2X^ 2 - 18 ) / X^2 = 0.

multiply both side by X^2 and you have (2X^2 - 18) = 0
divide both side by 2 and you have (X^2 - 9 ) = 0
Factor and you have (X - 3) (X + 3) = 0
So X = 3 and X = -3

According to my text book, it says that -3 is not in the domain. But WHY?? using -3 for X in the original formula does not cause any undefined values. Why is -3 not in the domain? Please let me know.

2007-09-19 07:25:53 · 2 answers · asked by Thai T 1

Who can convert 1.64m into Feet (that is how tall i am and i want to know in feet) ta x

2007-09-19 07:24:17 · 21 answers · asked by Anonymous

I know that you multiply the term by 2 but i dont know how to make that work for the nth term equation, I tried Ax^2 + Bx + c and it didnt work...so if anyone can help me i would appreciate it! Thanks!

2007-09-19 07:20:36 · 8 answers · asked by gigembabe09 1

How would I go about doing this? I know how to find a plane with three points. I got two more points from the line, but when I tried them, I got the wrong answer.... Anybody know how to do this?

2007-09-19 07:16:01 · 3 answers · asked by Amelia 6

2007-09-19 07:07:33 · 8 answers · asked by Eleanor T 3

I know this may be a stupid question but what is the slope of the derivative of y= x+ sqrt(x)

2007-09-19 06:53:21 · 1 answers · asked by frozenlint 2

When Alicia and Zoe ride a carousel, Alcia always selects a horse on the outside row, whereas Zoe prefers the row closest to the center. These rows are 19 ft 3 in and 13 ft 11 in from the center, respectively. The angular speed of the carousel is 2.4 revolutions per minute. What is the difference, in miles per hour, in the linear speeds of alicia and Zoe?

I got something like 2.193, but the book says it is .92. Help please! I'll pick a best answer TODAY!!!!!!

2007-09-19 06:49:36 · 3 answers · asked by James J 2

2007-09-19 06:42:26 · 10 answers · asked by Karen K 1

just looking for a quick and convenient way instead of solving the problems, i have a construction art project to turn in soon.

thanks!

2007-09-19 06:35:31 · 3 answers · asked by Anonymous

2007-09-19 06:28:33 · 2 answers · asked by Anonymous

2007-09-19 06:27:26 · 15 answers · asked by Anonymous

Consider the following differential equations written in parametric form:
r " – r(θ’)^2 + 2sinθ = 0
r(θ ”) + 2*(r ’)(θ’) + 2cosθ = 0
where (‘) = d/dt
subject to initial conditions
r(0) = 1
r ’(0) = 0
θ(0) = π/2
θ’(0) = -1

Show that the solution can be written in the form:
(rcosθ)^2 + rsinθ = 1

2007-09-19 06:20:49 · 1 answers · asked by Dr D 7

11x² - 1056x + 25344 = 0
Please, show the working.

2007-09-19 06:06:46 · 17 answers · asked by Anonymous

I'm really confused after not taking a math class in 12 years, please help!

1) ^5sqrt sign 1024x^4y^29

2) 9sqrt sign 108 minus 2sqrt sign 147 minus 3sqrt sign 192

Thanks for your help!!

2007-09-19 06:05:07 · 2 answers · asked by Duckie 26 2

At a given party there are n different couples. At this particular party, some people shake other peoples’ hands. No one shakes their own hand, and no one shakes his or her spouse’s hand. After
all the handshaking is said and done, Bob asks the other people at the party how many different peoples’ hands they shook. Strangely, he gets a different answer from every person. Prove by
induction that Bob’s wife, Alice, shakes exactly n hands.

2007-09-19 06:00:39 · 3 answers · asked by shakirh 1

( (x^-2 y / x^3 y^-4) / (x y^-1 / x^-3 y^2) )^6

it is askig for to mention the above in " positive "times" "

(i'm not good in english terms. not sure what you call the number that comes after sign ^. in my language the number coomes after the sign ^ is called "darshaka", now it is asking to mention this in positive "darshaka", sorry if you got confused with my language. i'm not good in english terms.)

please try to understand and give me a good anser. it is bit urgent. thanks alot.

2007-09-19 05:51:21 · 3 answers · asked by Anonymous

I would like to know how i can develope this , i will appriciate it if you show me step by step.

5x-1+(2x-3)(3x+1)

Thank You

2007-09-19 05:50:19 · 3 answers · asked by Anonymous

i'm not good in using english terms for maths. what do you say in english for followings, i'll give an ex. pls try to understand and answer me.

x^y (eg: 2^3) - what do you call in englis for this type things (y)

how do you call them when the sign infront of y changes,

eg: x^+y and x^-y

2007-09-19 05:38:59 · 6 answers · asked by Anonymous

the question is "draw the graph of F(x)=3-2x in the domain -1 is equal or less than x is equal to or less than 4"

do i just sub in -1 for x in the formula given get the answer and then the point on the line is -1 and the answer??

cheers!!

2007-09-19 05:32:51 · 5 answers · asked by Anonymous

Find the domain of the function.
h(x) = sqrt(x-2)-log5(10-x)

Differentiate the function
y=cos(e^(Pi(x))

working out would be preferred thanks

2007-09-19 05:22:17 · 1 answers · asked by Anonymous

3 guys on an island sinking surrounded by paronahs. they have a raft. the maximum weight is 305lbs 1 guy wieghts 102lbs the second guy 110 lbs the 3rd guys weights 265 lbs.

They all get off the island by way of raft.

How do they do it?

2007-09-19 05:20:50 · 9 answers · asked by Anonymous

I know the answer.....but don't know the way of solving it......anyone who can do it, describe me thoroughly, please......if you can make me understand, your answer will be chosen as a best answer!!!!

2007-09-19 05:19:16 · 5 answers · asked by maheer_bd 1