Mathematics - 15 August 2007

one third of Sam's saving is equal to two fifth of Brandon saving
If their total saving is $605, how much does Brandon has?

2007-08-15 23:47:03 · 5 answers · asked by narnia 2

2007-08-15 23:29:07 · 1 answers · asked by Anonymous

Can you please decipher this for me.

This cipher appeared in an old Royal Air Force pocket book dated 1937. It is a transposition type cipher with a message asking for help.

What is the message?

How many more men need to be sent?

AMVIPI WWYRHI VVITEM VXASHE CWLIEH QERWIG VIXPCM RXIVJI VMRKAS VOSRPE RHMRKK VSYRHW IRHXIR QSVIQI RZZZZZ

2007-08-15 23:16:38 · 2 answers · asked by Tim 2

A can complete a job in 25 days & B can complete the same job in 45 days. How much days it will required to complete the same job if both A & B work together - please fetch me the answer with working i.e., the way to solve this...

2007-08-15 22:59:20 · 6 answers · asked by vinu 1

a drop of oil, whose volume is 0.9mm^3 (9x10^-10 m^3) spreads out on the surface of water to form a circular disc of a diameter 84cm.

Q. what is the thickness of this disc. need work out pls

2007-08-15 22:45:54 · 3 answers · asked by Anonymous

another algebra.....havent done maths for a while....forgot everything

thx for ur help

2007-08-15 22:40:42 · 2 answers · asked by Anonymous

y = 8x^2 − 88x + 240
There are two intervals
working out would be helpful thanks

2007-08-15 22:28:15 · 2 answers · asked by Anonymous

A function is given by :

f(x) = (x + 1, x is greater than 1)
= (2, x = 1)
= (2-x^2, x is less than 1)

2007-08-15 22:21:40 · 2 answers · asked by vanisha j 1

a) volume is increasing. V=x^3
b) surface area is increasing. A=4x^2

2007-08-15 22:17:01 · 4 answers · asked by Anonymous

hi, im just wonder how do i go about answering this question?

log x + log y = log 3
log (3x +y) = 1

thanks bhavinp

2007-08-15 22:15:32 · 7 answers · asked by purejoker 2

At what rate is the area changing when t=30 minutes and t=65 minutes? Explain the meaning of each of your answers.

2007-08-15 22:11:45 · 3 answers · asked by Anonymous

a) Find an expression for dy/dx

b) Find the gradient of the tangent to the curve at the point
(-2,-1).

c) Find the equation of the normal to the curve at the point
(-2,-1)

Please answer all 3 qs its urgent

2007-08-15 22:02:51 · 2 answers · asked by Anonymous

Use the rules of differentiation to find the derivatives of the following function. Simplify terms wherever possible, but it is not necessary to factorise and then cancel any of the expressions.

2007-08-15 21:52:47 · 4 answers · asked by Anonymous

Use the rules of differentiation to find the derivatives of the following function. Simplify terms wherever possible, but it is not necessary to factorise and then cancel any of the expressions.

2007-08-15 21:50:32 · 2 answers · asked by Anonymous

Use the rules of differentiation to find the derivatives of the following function. Simplify terms wherever possible, but it is not necessary to factorise and then cancel any of the expressions.

2007-08-15 21:42:38 · 4 answers · asked by vanisha j 1

hi all, this question is actually in one of the exam practise papers for my younger brother who's only 9. I don't know if i should be worried but i came up with the answer (320) using a 6-step long algebraic method.
As i am tutoring him, do any of you guys know an easier, simpler, way to solve it so i can help him understand better? He hasn't learnt algebra yet.

Here's the question:
"After Denis spent $160 of his pocket money on food, and 3/4 of the remaining money to pay his mobile phone bill, he had 1/8 of his total pocket money left. How much pocket money did Denis have at first?"

Thank you so much! Also just out of curiosity, does anyone else think this maths problem isn't so easy for a 9 year old? (or am i just a little daft?)

2007-08-15 21:09:47 · 11 answers · asked by Anonymous

Ok, last one guys ^^

Thanks for all your help so far!

Ok, here it is:

A sail that is in the shape of an isosceles triangle has a vertex angle of 38 degrees.

The angle is included by two sides, each measuring 20 ft. Find the area of the sail.

Please refreash my memory on what an isoceles triangle and wish me luck on my test tommorow! I'm going to need it!!!

Thanks again everyone ^0^

2007-08-15 21:05:39 · 3 answers · asked by Rebirth _2007 1

hi all!
can you please help me out with some maths questions and how to work them out? here they are...

1) Between which two consecutive whole numbers does square root(8) lie?

2) Factorise by grouping
xy+2x+3y+6

3) Is the variable "milk production per cow"
A-ordinal
B- Nominal
C- Continuous
D- Discrete

4) Lisa had a box of apples. She gave 1/3 of them to henry and 1/4 of the remainder to Alex. If there were still 30 apples left, how many did she have at the start?

Thanks to all who attempt to answer.

2007-08-15 20:55:04 · 5 answers · asked by i love...love 2

Please explain this question is you can...

Ok, here goes:

An airplane leaves its airport on the east coast of the US and flies in a direction of 085 degrees.

Because of bad weather, it returns to another airport 230 km to the north of it's home base.

For the return trip, it flies in a direction of 283 degrees.

What is the total distance that the airplane flew?

Thanks for you help!!!!!!!!

2007-08-15 20:53:01 · 5 answers · asked by Rebirth _2007 1

Every employee can receive an additional 20% off of the lowest price of an item in a departmental store. if an employee purchase a dishwasher at 15% off sale, how much will he pay the dishwasher if its original cost is Rs.450? - please fetch me the answer with working i.e., the way to solve this...

2007-08-15 20:45:28 · 4 answers · asked by vinu 1

Please bear with me, I just have a few more questions to ask!

I'm so grateful for any help you can give me =)

Ok here goes:

An airplane leaves an airport and travels for 100 mi in a direction of 300 degrees. How far north of the airport is the plane then? How far west?

Thank you!!

Please explain as much as possible =)

2007-08-15 20:39:12 · 5 answers · asked by Rebirth _2007 1

Can anyone please help me with this Trig question?

I'm cramming for a test tommorow morning and I'm lost...

ok, here goes:

In Extremely large forests, it is not cost effective to position forest rangers in towers or to use small aircraft to continually watch for fires. Since lightning is a frequent cause of fire, lightning detectors are now used instead.

A detector at point Q is situated 15 mi west of a central fire station at point R.
The bearing from Q to where lightning hits due south of R is South37.6(degrees)East.
How far is the hit from point R?

Please explain as much as possible*

Thanks a million!!!!!!!!

2007-08-15 20:17:59 · 5 answers · asked by Rebirth _2007 1

3 = -2/4 + 4/2y so I have 4 and 2y as the denominators. The Algebra software program I am using gives the common denominator as 4y. How can that be if y is not common to both, 4 is common to both but not y.
thanks

2007-08-15 19:33:21 · 7 answers · asked by Boo Radley 4

2007-08-15 19:27:13 · 3 answers · asked by AJL 2

Is the caret mark (^) used in the problems posed here supposed to mean MULTIPLY??? If so, why not just use a lower case x like we were taught in school? When I see the caret, I don't know if it is simple multiplicatiion or if the person wants to take a number to the umpteenth power or something.
:{

2007-08-15 19:26:56 · 4 answers · asked by jan51601 7

What is the distance between the points
with (x,y) coordinates (3,–2) and
(–3,–1)?

2007-08-15 19:18:01 · 3 answers · asked by Anonymous

the wine glass has a cross section of a parabola for example x=.5y^2

2007-08-15 18:33:53 · 3 answers · asked by Anonymous

I want to understand different ways of writing in million and billion eg- 1,111 M in this case also means 1 billion.....right??

2007-08-15 18:32:47 · 18 answers · asked by Holly L 1

Just a sequences I thought up. 10 points for the first correct answer as to the next number (hopefully with explanation).

2, 24, 126, 416, 1050

2007-08-15 18:11:44 · 2 answers · asked by God 3

Find the equation of the ellipse that satisfy the given condition


heres the exact given taken from my quiz just 1 hour ago.

assuming that x^2/a^2 + y^2/a^2 is given. passing through (2,3), the latus rectum is 3 times the distance from the center to the focus.

how go get this?

2007-08-15 17:51:16 · 2 answers · asked by Patricia 2