Mathematics - 7 December 2007

Okay so finals are comming up and i have a 91% in my class and I want to get atleast a B (80%) in the class, so if my final is worth 20% of my over all grade what's the lowest I need to score in order fo get atleast a B?

2007-12-07 03:46:58 · 23 answers · asked by Abtsolutely 3

1.) what percent of 35 is 7?

2. 18 is 30% of what number?

2007-12-07 03:43:14 · 8 answers · asked by cyril_oreily 1

The height s of a ball (in feet) thrown with an initial velocity of 60 feet per second from an initial height of 12 feet is given as a function of the time t (in seconds) by the equation
s(t) = -16t^2 + 60t + 12

(a) Find the time at which height is maximum?

(b) What is the maximum height?

2007-12-07 03:40:16 · 7 answers · asked by journey 1

1. The Length of a rectangular cement patio is 3 ft less than three times the width. The sum of the length and the width of the patio is 21 ft. Find the length of the patio.

2. A coin bank contains pennies, nickels, and dimes. There are six times as many nickels as pennies and four times as many dimes as pennies. The total amount of money in the bank is $7.81. Find the number of pennies in the bank.

2007-12-07 03:37:28 · 2 answers · asked by Anonymous

1. Paul is fives times as old as his daughter Anna. In 12 years, Paul will be three times as old as Anna is in 12 years. How old is each one now?
2. the sum of three consecutive integers is 444. What are the numbers?

2007-12-07 03:35:56 · 5 answers · asked by lyme_aide 1

If it isn't could you give me a number that is less than x < -4


10 points for best answer. : )

2007-12-07 03:33:35 · 12 answers · asked by Cherry 2

figuring percentages

2007-12-07 03:32:12 · 3 answers · asked by sayhello41635 1

tan^2x/secx+1=1-cosx/cosx

i thought i got it to 1/cosx-1=1-cosx/cosx but im not sure if thats correct and dont know the next step.

2007-12-07 03:30:24 · 3 answers · asked by Anonymous

Find the centre and radius of the circle x^2+y^2-2x+8y-3=0

2007-12-07 03:28:58 · 3 answers · asked by Anonymous

2007-12-07 03:25:32 · 6 answers · asked by Anonymous

2007-12-07 03:19:23 · 26 answers · asked by Mike 1

Find the equation of the perpendicular to x+3y+1=0 and passes through P(1,2)

now what the hell has perpendicular got to do with algebra

2007-12-07 03:19:11 · 4 answers · asked by Anonymous

Thank you so much if you can help me out with this. It really needs a lot. I know to use the Pascal's Triangle but i need the answer and a procedure on how to get the answer. Thank you.

2007-12-07 03:19:08 · 3 answers · asked by Anonymous

cos(sin-1(1/3)-tan-1(1/2))

i got it down to cos((2rt8)-3/6) but im not sure if i did it right, anyone willing to check and see if that is it, or maybe your able to simplify it more.

2007-12-07 03:17:21 · 4 answers · asked by Anonymous

it says solve the simultaneous question
x^2-6xy+y^2=17
x+3y+1=0
plz show workings out and the method you used to work out the equation as it would help a lot as it would give me a greater understanding

2007-12-07 03:17:08 · 1 answers · asked by Anonymous

hi , heres the link

http://i174.photobucket.com/albums/w99/granmastern/july-dec%2007/linear.jpg

can you help me?

2007-12-07 03:13:04 · 1 answers · asked by nack nack 3

V = 20√(C + 273) relates speed of sound, V, in meters per second, to air temp, C, in degrees Celsius. What is the temp, in degrees Celcsius, when the speed of sound is 320 meters per second?

Do you just plug in the 320? What answer did you get, and how did you do it?

2007-12-07 03:13:01 · 3 answers · asked by Anonymous

how do you use Pascal's Triangle to solve this?

2007-12-07 03:09:13 · 3 answers · asked by Anonymous

i need the answer and how to preform it. Teach me how to get the answer to this question. PLEASE!!

2007-12-07 03:08:00 · 4 answers · asked by Anonymous

Find the sum of the last three digits of the number:
1 * 2^2 * 3^3 * 4^4 ...... * 2004^2004.

Please help; thanks in advance.

2007-12-07 02:53:11 · 5 answers · asked by PeterW 1

-2x = 27 - 5y
4y = 20 + 2x

2007-12-07 02:53:00 · 3 answers · asked by Jeff C 2

2007-12-07 02:43:00 · 7 answers · asked by esvskater87 1

Im sorry, but my keyboard doesnt have power to the 3 or power to the two...
So i will use symbols:

*=3
"=2

Simplify the following:

(x + 5)* - x( x + 3)" - 7x + 4

And please show me your work, because this confused me a bit...

Thanks you ALOT!!!!!!!!

2007-12-07 02:42:33 · 6 answers · asked by Anonymous

suppose that every subsequence of X = x-n
have asubsequence that converges to 0 .
and show that lim X=0

2007-12-07 02:09:19 · 2 answers · asked by Dana S 1

Starting with d^2u/dx=du/dy or written u(xx)=u(y)
y>0, 0 u(x,0)=1, u(o,y)=u(a,y)=0
Taking the Laplace transform of u with respect to y gives:
L[u(xx)]=su-1, with the left hand side being just the ordinary differential equation as x is not affected by the Laplace.
The general solution is:
u(x,s) = c(1)e^(xSQRT(s)) + c(2)e^(-xSQRT(s)) + c(3),
which could also be written in terms of cosh and sinh.
How do I find c(3) using the method of undetermined coefficients?
Please try to explain it out. Many of my questions are answered by pulsing brainiacs from another dimension who tend to make succinct responses that they understand but please I am not so smart and have to trudge through step by step. Thanks.

2007-12-07 01:57:13 · 2 answers · asked by entropic v 3

I am a biology student.
I learned that this theory is even useful in evolutionary biology....
Can anyone explain this theory to me in simple word..
I have seen Beautiful Mind (Russel Crow as Dr. Nash)

2007-12-07 01:46:11 · 3 answers · asked by saru 2

I haven't attempted high-school Algebra since 1984 and I will soon take the Praxis test.

Can someone please help with this problem?

- Solve for x

3x^2 + 4g + 1 = 0

(please show and explain all of the steps).

Thanks!

2007-12-07 01:31:06 · 4 answers · asked by Mahai217 2

this is a simultenous equation
4x+2y=5
3x-4y=1

2007-12-07 01:16:11 · 9 answers · asked by Spicy_dymples 1

4sin(x/2)cos(x/2)=2sinx

assuming that x/2 is in quadrant 1

2007-12-07 01:04:30 · 2 answers · asked by Anonymous

the answer is supposed to be 5/11. I'm not sure how they came up with the answer. can anybody show me how they came up with the answer, please include formula.

2007-12-07 00:56:56 · 3 answers · asked by kittykat 2