Mathematics - 30 September 2007

Roger can paint a room in 6 hrs, Chris can paint the room in 8 hrs. If they begin together and Chris takes a 1 hr break determine the amount of time in hrs and minutes that it will take the room to be painted.

no clue as to how to do the problem

2007-09-30 08:51:41 · 3 answers · asked by Anonymous

1. Y= sinx+(sin)^2(x) (0,0)

2. Y= sin(sinx) (pie, 0)

2007-09-30 08:49:08 · 1 answers · asked by Kimberly L 1

the equation for the first line is 4y+x=0
the second is y=2x-3
where will these two lines intersect?

i got (1/3,1/3) which im pretty sure is wrong. could someone please show me how to do this

2007-09-30 08:27:36 · 0 answers · asked by Wainwright for Cy Young 3

I need to know how to solve this problem along with the answer.

2007-09-30 08:20:56 · 2 answers · asked by camille l 1

A line of 80 squares to have 1/40 shaded. What is the maximum number of ways this can be done. Is there a combination to work this out and if not does someone know the exact answer.
Thanks

Joe

2007-09-30 08:15:17 · 2 answers · asked by Anonymous

OK I was doing algarithms for A-level further maths, and I want to know how this works (I don't think it has that much to do with algorithms but i may be wrong). Heres a question I had involving it:

A computer takes 1.5 seconds to sort 1000 numbers. If it is a quadratic complexity, how long would it take to sort 100000 numbers?

I think it has something to do with squaring the time whenever the number of numbers, but when I attempted the question I ended up with a huge mess. Please can I have step by step instructions and information on quadratic complexities, what they are used fo etc (anything I might need to know). Thankyou.

2007-09-30 08:09:56 · 2 answers · asked by honourableone 3

Future value. If $50,000 is deposited in a bank account paying 5% compound quarterly, than what will be the value of the account at the end of 18 years? How long will it rake for the investment to double, compound quarterly? How long will it take for the investment to triple, compound continuously?
A=P(1+(r/n))^nt

how do I solve this problem. please show how you got it.
thank you.

2007-09-30 07:53:29 · 3 answers · asked by xyz 1

im confused im supposed to factor the polynomial and find the zeros...yet i dont know why im wrong...help someone please!

f(x)=(3x^3)-(x^2)-12x+4

this is what i have :(x+2)(x-2)(3x+1)(3x-1)
and the zeros are: -2,2,-1/3,1/3

2007-09-30 07:41:42 · 6 answers · asked by ...i <3 Xavi... 2

2007-09-30 07:41:23 · 30 answers · asked by P M 1

A) if you own a dog, you must buy a license
B) if you buy a license, you will not have any money
C) if you do not have any money, you are a bum
conclusion: if you own a dog, you are a bum

if im not right, please tell me what order to write ABC in. the conclusion always stays the same. thanks! (another below)

A) Treasure hunters love the sea.
B) People who love the sea are great swimmers.
C) If a person is a great swimmer, he will win an Olympic medal.
D) Olympic winners smile a lot.
conclusion: Treasure hunters smile a lot.

i thought its either in that order, or the complete opposite DCBA.

all help is much appreciated & i will choose an answer

2007-09-30 07:30:00 · 3 answers · asked by lp 1

http://i181.photobucket.com/albums/x85/ctti_3/untitled-76.jpg

2007-09-30 07:24:50 · 1 answers · asked by Kelly 1

A+B+C=195 ................(1)
B+C+D=210.................(2)
C+D+E=196.................(3)
D+E+F=208.................(4)
E+F+G=213.................(5)
A+B+C+D+E+F+G=491....(6)


whats the value of G,A,D ?

Soln given :G=88 , A=68,D=83


How to solve this eqn ?

can anybody please give me some hints which equations to take and solve to find G,A,D ?


please dont provide soln but give hints.

thanks

2007-09-30 07:23:24 · 2 answers · asked by Anonymous

to an and that a > 0. Show that there is an index N such that a(subn) >0 for all indices n>= N

2007-09-30 07:02:29 · 2 answers · asked by Leo 3

http://i181.photobucket.com/albums/x85/ctti_3/untitled-74.jpg
the answer was said to be #5 but i dont get it

2007-09-30 06:59:28 · 3 answers · asked by ruby 2

Trigonometry + Algebra?

2007-09-30 06:58:16 · 4 answers · asked by Jupiter 1

What is the inverse function of the function y=x^3 - x?

2007-09-30 06:55:09 · 2 answers · asked by me8md 3

2007-09-30 06:53:36 · 2 answers · asked by spanishfly_100 1

how do find f^-1 (inverse) for the function f?

f(x) = logˇ2 (-x+3)-5
{log-base-2 (-x+3)-5 }

f(x) = e^(x+2) -3

please show how you got the answer
thank you

2007-09-30 06:51:37 · 3 answers · asked by abc 1

How do I calculate the precision of two numbers? The numbers are 77 million and 77,108,414.

2007-09-30 06:49:12 · 1 answers · asked by Kristen K 2

Define expanded form??? What is it????????

2007-09-30 06:43:43 · 2 answers · asked by tink7155 2

Daniel walks directly towards a flat mirror with a rapidity of 0,25 m/s
he determines the rapidity of his image with respect to.

to 0,13 m/s
b 1,0 m/s
c 0,50 m/d
d 0,25 m /s
and 0.75

I chosen i C, am correct


thanks

2007-09-30 06:30:32 · 2 answers · asked by Anonymous

What's 90% as a fraction? And whats 5% as a fraction. BUT tell me how you got this. lol 10 points for winner

2007-09-30 06:04:50 · 6 answers · asked by Revinder 2

2007-09-30 06:01:49 · 10 answers · asked by southern_rdhd_angel 1

2007-09-30 05:51:58 · 4 answers · asked by Random_girl 2

a) e^(2x+3) - 7 = 0
b) ln(5-2x) = -3

2007-09-30 05:44:29 · 9 answers · asked by Vince 1

Solve the equation by making an appropriate substitution:

(x2 - 3x)2 - 14(x2 - 3x) + 40 = 0

a. {-2, -1, 5, 4}
b. {-2, -1, 10, 4, 5, 4}
c. {10, 4}
d. {5, 4}

2007-09-30 05:05:29 · 6 answers · asked by charliemo 1

So the question is 1/2+1/d-2=d/16

First person to answer the question correctly gets 10 points. Thanks.

2007-09-30 04:57:29 · 3 answers · asked by John D 2

2/w = x/5. explain the solution to me step by step

2007-09-30 04:55:36 · 10 answers · asked by rene w 2

81-t * 9 – root t
----------
9 – root t *9 – root t
=
81 – t (9 – rt t)
-------------------
81 – t
81 – t (9 – rt t) / -81
-------------------
81 – t / -81

81 – 9 – rt t
-------------------
81
/ -rt t
=9- rt t

where did i go wrong?

2007-09-30 04:46:22 · 2 answers · asked by Ar J 2

e^ {[x-1]/2}

2007-09-30 04:42:06 · 2 answers · asked by Chocolate Strawberries. 4