Mathematics - 28 August 2007

1, find all the prime numbers between 80 and 100
2, which numbers, less than 100, with a 1 in the units place are prime numbers?
3, list all the prime numbers which will divide exactly into:
1890 and 1155



first correct 10 pts plus i will star your next 3 questions.

2007-08-28 07:30:51 · 10 answers · asked by Anonymous

The inverse of each function

f(x)= 3/4x

g(x)= 3+x
y=3x-2

2007-08-28 07:27:11 · 8 answers · asked by Qamb 1

2007-08-28 07:26:12 · 6 answers · asked by nadieya 1

Which of these Equations or functions are linear ? yes or no you'll help a lot if you explain me why
Becuase seriously i'm having a lot of problems with them

h(x) =23

y= 2/3x

y=5/x

9-5xy=2

I hope you can help me

2007-08-28 07:24:48 · 5 answers · asked by Qamb 1

2007-08-28 07:15:49 · 7 answers · asked by Wilberto R 1

integrate: arctan(7z)dz

2007-08-28 07:15:12 · 7 answers · asked by the man 2

2007-08-28 07:07:16 · 3 answers · asked by Wilberto R 1

and a car at point C heading for point D going 50 mph.On the car at point a is a fly.this fly is giong to fly between point a and point c. the question is ,how many times will the fly fly between the two cars.

2007-08-28 07:01:46 · 5 answers · asked by drummer158 3

How many cars were involved?
Please show math work.

2007-08-28 06:56:55 · 9 answers · asked by Monica 1

a) 49
b) 50
c) 51
d) 52
e) 53

2007-08-28 06:36:07 · 17 answers · asked by Alexander 6

A certain grade in a school contains 96 pupils. If there are 40 boys, what is the ratio of boys to girls in this grade?

2. A man borrowed $65 from the bank for one year. He paid $7.80 in interest. What rate of interest was charged by the bank?


PLEASE HELP!

THANKS!

2007-08-28 06:28:38 · 8 answers · asked by someone 1

What does ex (4/3) or (1/5) mean in computer math because i asked a question and i have no idea if that means multiply or divide or whatever. 10 points and a best answer for whoever answers the first!

2007-08-28 06:20:43 · 9 answers · asked by KayKay 2

Can you show the steps? thanks a lot
Alix Witvoet

2007-08-28 06:10:58 · 3 answers · asked by Fake Account 1

given a graph (that I am not sure how to put on here) find the expression f(x)=Ca^x

two points (0,2), (2,2/9)

I tried to solve it by
pluging in 2=Ca^x
I know that x=0 at Y=2
2=C1 (a^0 is 1 correct?)
2=C

plug in 2 for a in 2/9=2a^2
solve for a and get 2/3??
divide by 2
(2/9)/(2)=a^2
times the reciprocal of 2 (1/2)(2/9) gives you (2/18). sqrt that and I got 1/3

so f(x)=2(1/3)^x

not sure if it is right, but did I go about the problem correctly or is there another way to solve this?

2007-08-28 06:09:40 · 3 answers · asked by m_carl 1

2007-08-28 06:08:40 · 10 answers · asked by Anonymous

The function f is defined for the domain -3 f(x) = 9 (x - 1/3)^2 - 11

(i) Find the range of f.

(ii) State the coordinates and nature of the turning point of
(a) the curve y = f(x)
(b) the curve y = If(x)I

2007-08-28 05:41:08 · 3 answers · asked by plolol 2

Let a_n, n =1,2,3... be a sequence of positive real numbers and let k >0. Let s_n = a_1 + a_2....+ a_n be the sequence of partial sums of a_n. Show that the series

1) Sum (a_n)/(a_n + k) and 2) Sum (a_n)/(s_n) converges if, and only if, s_n converges.

Thank you for any help.

2007-08-28 05:37:29 · 3 answers · asked by Melissa 1

a) If there are numbers between 1 and 49, and 6 are to be drawn at random, what are the possible number of outcomes?
b) Imagine if I write 1,2,3,4,5 and 6 on a note book, and 1 - 49 written on small pieces (i.e. 49 small pieces of paper of paper) kept in a box, what is the probability that the 6 numbers i draw from the box are:
i) the same 6 number
ii) 5 matching numbers
iii) 4 matching numbers
iv) 3 matching numbers
v) 2 matching numbers
vi) 1 matching numbers
vii) no matching numbers

C) does the number of possible outcomes have an effect on the probability of matching numbers?

P.S. numbers once drawn cannot be repeated and I know it is not a permutation question. so 49P6 is not the right answer for the first question.

please give formulae aswell

2007-08-28 05:37:14 · 5 answers · asked by shafique_khan83 2

mathematics

2007-08-28 05:21:29 · 6 answers · asked by srohi_786 1

If the perimeter of a rectangle is 26 ft and the width is 9 ft, find its length. [Hint: The perimeter of a rectangle is given by P = 2L + 2W.]

2007-08-28 05:17:37 · 9 answers · asked by Anonymous

A principal of $5000 was invested in a savings account for 4 years. If the interest earned for the period was $400, what was the interest rate?
A) 1%
B) 1.5%
C) 2%
D) 2.5%

2007-08-28 05:16:43 · 4 answers · asked by Anonymous

Please help. I am stuck and my text does not give an example for these. How do I solve this problem? Please include how to solve. Only solving the problem will not really help. thank you thank you!!

The average profit per unit for Product A is $5.51, Product B is $9.08, and Product C is $13.89. If the percentages of each sold are 29, 30, and 41 respectively, what is the weighted mean profit per unit?

2007-08-28 05:15:42 · 5 answers · asked by jane d 1

Evaluate. 5 • 4 ÷ 2 – 4^2

2007-08-28 05:12:25 · 11 answers · asked by Anonymous

Consider the graph of y = ex.
(a) Find the equation of the graph that results from reflecting about the line y = 5.
I tried to plug in 5 for x but that is not correct so for example, e^-5 was not correct.

I'm lost as to what the question is asking me.

2007-08-28 05:06:49 · 4 answers · asked by m_carl 1

I have a table of units of advertising and revenue:

Rev: 20 | 50 | 30 | 100 | 50 | 90 | 80
Ads: 1 | 2 | 3 | 4 | 5 | 6 | 7

I have drawn the graph (first part of the questio), but now I have to calculate the correlation coefficient between advertising and revenues.

Does anybody know the formula (in really simple terms) for this please? I will be very very grateful for any help! Sorry to be a nuisence, I'm just really stuck.

2007-08-28 04:49:03 · 2 answers · asked by Anonymous

The 3rd angle is 10 degrees more than the 2nd angle. find the measure of the 1st angle." in Yahoo! Answers

2007-08-28 04:44:17 · 8 answers · asked by wgag69 1

2007-08-28 04:25:31 · 3 answers · asked by MANDY 1

The function f is defined for the domain -3 f(x) = 9 (x - 1/3)^2 - 11

(i) Find the range of f.

(ii) State the coordinates and nature of the turning point of
(a) the curve y = f(x)
(b) the curve y = I f(x) I

2007-08-28 04:24:15 · 1 answers · asked by Anonymous

1. 5/a + 6/b
2. w/3 - k/5
3. 3x/y(9y/x)
4. 5x-11x=23 x= ?
5. 4/5y - 8 = 2/5y +16 y= ?
6._a-6_= _a-2_ (_ _ = a-6 over 12) a = ?
12 4
7. 1/2x + 5/6 = 3/4x - 1/3 x= ?
8. 4/5y - 8 = 2/5y + 16 y = ?
9. -4w + 5 <_ -12 ( <_ =less than or equal to)
10. 8+3b < 2(9-b)

Any help you can give is much appreciated. Ive tried all these 10 times over and gotten nothing.

2007-08-28 04:24:01 · 3 answers · asked by Need Help 1

2007-08-28 04:22:04 · 7 answers · asked by MANDY 1