Mathematics - 27 December 2007

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2007-12-27 16:49:41 · 6 answers · asked by Anonymous

Brian has $88 in his savings account. If he saves $3.50 per week, how long will it take him ti have $200 in his account?


i dont understand this problem and i dont have anyone to help me so plz help.

2007-12-27 16:47:34 · 19 answers · asked by imhere 1

[{(2^2)(2^3)}5^5]/[(2^3)(3^4)(10^5)]

How do you simplify that without having to calculate all of those things?

{ },[ ], and ( ) are all brackets by the way.

2007-12-27 16:28:50 · 9 answers · asked by Anonymous

Please help me....Im so frustrated....
These are the 18 numbers....

7.1

9.2

8.0

6.1

14.4

8.5

6.1

6.8

7.7

21.5

6.7

9.0

8.4

7.0

11.5

14.1

9.5


8.6

Please help me...From my understanding you must find the mean....then you subtract the numbers to the mean, and add up the difference and divide it by 18...Why do i keep getting different answers...

10 PTS TO THE first correct answer.....Thanks.

2007-12-27 16:14:44 · 3 answers · asked by Anonymous

please say the answer with procedure.

2007-12-27 16:04:15 · 4 answers · asked by soumya a 1

2007-12-27 16:01:34 · 11 answers · asked by sm.prasadd 1

Solve the system of equations using addition (elimnation) method. If the answer is a unique solution, present it as an ordered pair (x,y) If not, specify whether the answer is "no solution" or Infiniely many solutions"

3x - 11y = 9
-9x + 33y + 18

2007-12-27 15:52:53 · 6 answers · asked by Maggie L 1

well im solving for t
2cos t = 6cos t - squreroot 12
3cos t= -sq rt 12
cos t = -sqr rt 12/3
cost t=2 sq rt 3/3

the angle is 30 how do i get it???

2007-12-27 15:37:53 · 6 answers · asked by suzy 1

2007-12-27 15:26:59 · 5 answers · asked by Steve 1

Can anyone help me out on this one i just keep getting it wrong and i have no idea how. :)

log(base2) (X+4) - log (base2) (x-3) =3

2007-12-27 14:51:53 · 12 answers · asked by idontknow 2

2007-12-27 14:32:49 · 16 answers · asked by Diamondbbyx3 1

can u pls determine the slope and the y-intercept in these equations:

1. y=1-7x
2. y=3
3. y-8x=6

im having a problem with these.and how do i graph it?

i just can't get the change in x and the second point!

help me pls... i would be really happy if you show me how to graph it. thanks and good day.

2007-12-27 14:28:40 · 3 answers · asked by Anonymous

Please help me find the first derivative of this polynomial:
12x^2+3x

2007-12-27 14:13:49 · 8 answers · asked by Anonymous

I need some help with this particular question from the homework:

Prove: n^5 - n is divisible by 10 for all n ≥2

What steps should I take?
Thanks in advance!

2007-12-27 14:04:27 · 7 answers · asked by yayaya 3

Solve the following linear system for x using Cramer’s rule.
Show work.

2007-12-27 13:56:29 · 5 answers · asked by samoht 1

solve the equation.
sec^2x-secx-2=0

so HARD!

2007-12-27 13:48:14 · 9 answers · asked by green 3

Click on the link and there is a picture and a measurement. Please answer to best ability, THANKS!


http://www.abcdistributing.com/home/catalog/cat_item_pg.asp?G=347&P=399

2007-12-27 13:44:40 · 6 answers · asked by Anonymous

I'm confused

2007-12-27 13:35:35 · 11 answers · asked by Anonymous

Given the function f defined by f(x) = cosx -cos^2 x for [-pi,pi]

a) find the x intercepts
b) find the x and y coordinates of all relative max. points of f & justify your answer
c) find the intervals on which the graph is increasing

2007-12-27 13:31:04 · 3 answers · asked by Anonymous

1: Write in interval notation: x > 3 AND x ≤ 7
(-∞, 7)
(3, 7]
(-∞, ∞)
(3, ∞)


2: Write in interval notation: 4 > x OR 3 > x
(3, 4)
(-∞, 3)
(-∞, 4)
(-∞, ∞)


3: Write in interval notation: x ≤ -3 AND x > -10
(-10, -3]
(-∞, -3]
[-10, -3)
(-∞, ∞)


4: Write in interval notation: x > 2 OR 5 > x
(2, 5)
(-∞, ∞)
(-∞, 5)
(2, ∞)


5: Write in interval notation: x > 2 AND 5 > x
(2, 5)
(-∞, ∞)
(-∞, 5)
(2, ∞)


6: Write in interval notation: x > 2 OR 5 < x
(2, 5)
(-∞, ∞)
(-∞, 5)
(2, ∞)


7: Solve and write in interval notation: x − 3 > 8 AND x + 2 > 4
(-∞, ∞)
(2, ∞)
(2, 11)
(11, ∞)


8: Solve and write in interval notation: 7 ≥ x + 4 OR x − 3 < 2
(-∞, 5)
(-∞, ∞)
[3, 5)
(3, ∞)


9: Solve and write in interval notation: x / 2 ≤ -3 AND x − 5 < 2
(-∞, -3/2)
(-∞, -6]
(-∞, 7)
(-∞, ∞)


10: Solve and write in interval notation: -3 ≤ (x + 4) / 3 < -1
(-∞, ∞)
(-13, ∞)
[-13, -7)
[-13, -5)

2007-12-27 13:18:37 · 4 answers · asked by Ashley G 1

Provide a coefficient matrix corresponding to the system of linear equations.

2007-12-27 13:13:56 · 2 answers · asked by samoht 1

3x^2 - 34x - 24 = 0

2007-12-27 13:09:58 · 6 answers · asked by LaLaLa :) 2

I answered "cos A" and I was wrong!! ideas? thanks

2007-12-27 13:05:34 · 3 answers · asked by Eyepatch 2

how many different ways can five people A,B,C,D,E, sit in a row if

a) C must sit to the right of, but not necessarily next to B
B) D and E must not sit together

pls include solutions and explanations

2007-12-27 13:01:50 · 6 answers · asked by AskMe 2

How many packages, each in the shape of a cube with 6-inch edges, will fit inside the shopping crate?

2007-12-27 13:00:41 · 5 answers · asked by Diamondbbyx3 1

A group of hikers is to travel x km by bus at an average speed of 48 km/h to an unknown destination. They then plan to walk back along the same route at an average speed of 4.8 km/h and to arrive back 24 hours after setting out in the bus. If they allow 2 h for lunch and rest, how far must the bus take them?

2007-12-27 12:49:17 · 3 answers · asked by jo 2

how do u find the slope of the line normal to the graph of y=3secx at x=pi/4?

2007-12-27 12:41:50 · 2 answers · asked by remote control 1

if f(x) =xlnx, then at x=1:

Which one is correct?

a) f is increasing
b) f is decreasing
c) f has a relative minimum
d) f has a relative maximum
e) f has a pt. of infelction

2007-12-27 12:37:42 · 2 answers · asked by remote control 1

if (x^2)[(ln^2)(x)], then what does y'=?

i'm especially confused with the ln squared...how do you multiply with that?

2007-12-27 12:28:58 · 3 answers · asked by WynnLasVegas 1

2007-12-27 12:04:19 · 11 answers · asked by Chrisy 1