Mathematics - 30 November 2007

When the time is 2:18, how many degrees are there in the acute angle between the minute hand and the hour hand on a clock?

2007-11-30 13:13:05 · 5 answers · asked by anonymous 2

2007-11-30 13:02:43 · 7 answers · asked by jared r 1

2007-11-30 13:00:33 · 6 answers · asked by Anonymous

z=x-y+4
z=y-w-3
z=w-x+5

What is the value of z?
A. 2
B. 3
C. 4
D. 6
E. 12

The answer is D. How do I do this?

2007-11-30 12:53:27 · 6 answers · asked by Anonymous

What does it mean???

2007-11-30 12:33:31 · 5 answers · asked by Anonymous

Find a value of x satisfying the equation

5[sqrt(1-x) + sqrt(1+x)] = 6x + 8[sqrt(1 - (x^2))].

2007-11-30 12:28:47 · 7 answers · asked by absird 5

As an incentive to get his son to do his arithmatic homework, a father offered him 10 cents for every problem done correctly but fined him 6 cents for every problem done incorrectly. When the father corrected the 24 problems, neither owed any money to the other. How many problems did the boy solve correctly?

2007-11-30 12:27:10 · 18 answers · asked by Off the Key of Reason 3

2007-11-30 12:26:15 · 3 answers · asked by Anonymous

Explain how the use of Descartes' Rule of Signs can simplify the process of finding the zeros of the following polynomial:

P(x) = 12x^4 + x^3 + 4x^2 + 7x + 8

Using the theorems and techniques of this section, find the zeros of the following polynomial:

P(x) = x^3 - 4x^2 + x + 6

2007-11-30 12:22:34 · 4 answers · asked by Zack A 1

a department store sells jewellery and cosmetics. On a certain day the total number of persons buying jewellery or cosmetics or both was 400. given that 250 persons bought jewellery, 2x persons bought cosmetics only, x persons bought both jewellery and cosmetics.
(a) write an expression in terms of x, to represent the total number of person buying jewlery or cosmetics or both

2007-11-30 12:18:37 · 2 answers · asked by baby 1

The thing is that I do not think would form a triangle.But the sides are in inches anyways.

2007-11-30 12:16:21 · 7 answers · asked by Count Bleck 1

(A) x=25530, y=29464 (B) x=37615, y=26855 (C) x=15123, y=32477; (D) x=28326, y =28614 (E) x=22536, y=27462

(Note: No calculator is allowed for this question)

Tks a lot

2007-11-30 12:16:19 · 2 answers · asked by Answer Seeker 1

clues:
1. Determine what number T must represent.
2. Determine H by looking only at the addition potion.
3. Determine R by looking only at the addition portion.
4. Determine W by looking only at the addition portion.
5. Solve problem by trial and error.
6. straw × o= warts(straw flipped backwards.

2007-11-30 12:14:37 · 5 answers · asked by spirina 3

In the figure below, points C, D, and F are collinear, ACF and CDE are equilateral triangles, and b + d = 90 degrees. Use a two column proof to prove that ABC is a right triangle.



YAH! I am so confused and I look at how to do it and I still dont get it...

2007-11-30 12:08:26 · 3 answers · asked by Anonymous

i have to do this problem and i cant figure out the answer. i can use either substitution or elimination plz help.

2y = -4x
4x + 2y = -11

2007-11-30 12:01:08 · 12 answers · asked by tinkerbell 1

find the shortest distance form the origin to the surface 3x^2+6y^2-4z^2 = 54

what I did is I found the distance d from some point on the surface (x,y,z) to the origin would be d = sqrt(x^2+y^2+z^2) and that this could be stated as a function of f(x,y,z) as:

f(x,y,z) = x^2+y^2+z^2 and I must find the min of this functoin subject ot the constraint 3x^2+6y^2-4z^2 = 54, but the method of Lagrange multipliers does not work here, why???

2007-11-30 11:56:12 · 3 answers · asked by Anonymous

A wire 5 ft long is to be cut into two pieces. One piece is to be bent into the shape of a circle and the other into the shape of a square. Where should the wire be cut so that the sum of the areas of the circle and square is
(a) a maximum
(b) a minimum

2007-11-30 11:55:12 · 6 answers · asked by deadman 2

in a group of 40 syudents,all study mathematics, 28 do biology and mathematics, 20 do geography and mathemeatics, x students study alll 3 subjects.

(a) determine the amount that does all 3 subjects

2007-11-30 11:53:51 · 3 answers · asked by baby 1

Y is directly proportional to X. I searched all the fonts and symbols....yet to find it . The quickest way is to ask all the smart friends from all corners of the earth. Thanks to you all.

2007-11-30 11:53:15 · 10 answers · asked by teach1inch thick 1

PLEASE HELP ME WITH MY HOMEWORK I SERIOUSLY DONT GET IT. please show ur work :D

Pierre was born in the twentieth century and will be x years old in the year x2(x to the second power). In what year was Pierre Born?

2007-11-30 11:49:10 · 5 answers · asked by Anonymous

s=-t^2+6t+5, where t is measured in seconds. Find the average velocity over the following time period. t E [2,4].

2007-11-30 11:07:03 · 4 answers · asked by Anonymous

2.Convert the following fraction to equivalent fractions, each with the LCD as the common denominator: 7/3,8/6

2007-11-30 11:03:18 · 8 answers · asked by Anonymous

I try to figure out this problem and my whole family but we think its impossible. my whole class asked my teacher and she said ill give u the weekend to firgure out.

When open the website look at number 4. Also remember it says 4 DIFFERENT DIGITS

http://img152.imageshack.us/my.php?image=njmath22fu7.jpg

2007-11-30 11:00:18 · 14 answers · asked by MentoKings10 2

2007-11-30 10:53:13 · 6 answers · asked by dizkneelandaway 1

Suppsoe that a, b, c are sides of of a triangle. Prove that:
a^2(b + c - a) + b^2(c + a - b) + c^2(a + b - c) <= 3abc

I can't seem to do this! I've tried using algebra and triangle inequality rules. Should I use trignometry?!?!

Please provide me with work and an answer.

Thanks! Merry Christmas.

2007-11-30 10:45:37 · 2 answers · asked by UnknownD 6

explain answer

2007-11-30 10:41:15 · 7 answers · asked by Anonymous

This ? concerns roots. Here is the problem:

8 5/6 (this problem follows the rule of: a m/n = n, then the "square root" sign; then, inside the sq. root, a to the m power)

8 5/6= 6th root of 8 to the 5th power

So, it is the 6th root of 32, 768.

I don't have a calculator w/ me, so
I couldn't give you the answer.

Anyway, I believe that 6th root of 8 to
the 5th power is the answer (short of
solving that final part of the problem).

2007-11-30 10:41:12 · 3 answers · asked by Anonymous

explain answer

2007-11-30 10:36:42 · 13 answers · asked by Anonymous

Consider the function f(x)=e(x-5) +8. If we express range of f(x) in the form of (A, infinity) and we write Y=B for the equation of the horizontal assymptote than A=? B=?

2007-11-30 10:32:43 · 1 answers · asked by Shwipe 2

multiply

2007-11-30 10:29:46 · 3 answers · asked by thonia 1