Mathematics - 26 December 2007

My teacher hates us and gives homework over winter break.

Solve for X:

16x^2 - 9 = 0

a) {16/9 , -16/9}
b) {4/3 , -4/3}
c) {3/4 , -3/4}
d) {9/16 , -9/16}
e) {3/4 , 9/16}
f) None of the above.

And please, don't say None of the above unless it's really N/A. Thanks!

2007-12-26 09:31:36 · 16 answers · asked by Wai 5

will the logical pattern work if the sum is a different number?

2007-12-26 09:30:40 · 0 answers · asked by ayeeeeo 1

2007-12-26 09:24:37 · 5 answers · asked by linc 1

This problem deals with finding modulus roots.
Is there a general method for solving problems like the one described below.

Solve the following

5^(1/7)mod(47)

ie find a number x, such that x^7 = 5 (mod 47).

2007-12-26 09:20:49 · 6 answers · asked by Christine P 5

what is the difference between the measures of the largest and smallest angles of the triangle? (I keep getting 40 and that is incorrect) Please explain how you got the answer THANKS!

2007-12-26 09:14:35 · 12 answers · asked by staciaschool2 2

Hope you all had a Merry Christmas yesterday. The challenge du jour:

Let n be an arbitrary fixed positive integer, and consider the right-hand Riemann sums of the function x^n obtained from a partition of [0, 1] into m equal intervals. These are:

[k=1, m]∑(1/m * (k/m)^n)

Using the fundamental theorem of calculus, it is of course trivial to prove that:

[m→∞]lim [k=1, m]∑(1/m * (k/m)^n) = [0, 1]∫x^n dx = x^(n+1)/(n+1) |[0, 1] = 1/(n+1).

Your mission, should you decide to accept it, is to prove the limit [m→∞]lim [k=1, m]∑(1/m * (k/m)^n) = 1/(n+1) _directly_, without using the fundamental theorem. Can you do it?

2007-12-26 09:12:54 · 3 answers · asked by Pascal 7

whats wrong with the decimal system

2007-12-26 09:11:44 · 9 answers · asked by pizzaboy 1

This is a probability problem, not a physics problem, so dynamical behavior of solid bodies shall be disregarded. An ideal dumbbell of 2 identical spheres is connected by a solid rod, so that the centers of the spheres are 1 unit apart. There are 2 infinitely long adjacent rows of spherical indentations 1 unit apart, the indentations of both rows being aligned with each other such that the distances between them are also 1 unit apart. The dumbbell is thrown upon these rows at random, so that any one sphere of the dumbbell will come to a rest in any indentation with equal likelihood. What's the probability of the dumbbell landing with one sphere on row 1, and the other on row 2? Give reasoning, please?

2007-12-26 09:07:30 · 4 answers · asked by Scythian1950 7

Im totally lost with this...Im going to copy the question word by word... Please help...Correct answer gets 10 pts..

A black hole is a region in space where objects seem to disappear.A formula in the study of black holes is the Schwarzchild formula.

R= 2GM
-------------
c^2


Based on the laws of logarithms, log B can be represented by

A)2 logG + logM - log 2c

B)log 2G + log M- log 2c

C)log 2+ log G+ log M - 2 log c

D)2 log GM- 2 log c


If you may, can you explain how you got to the answer. Thanks I appreciate it much.

2007-12-26 08:52:24 · 10 answers · asked by Anonymous

2007-12-26 08:46:46 · 8 answers · asked by D*Star 1

What are the main things that I should know and practice before the big test?

I have about 2 1/2 weeks before the exam.....

2007-12-26 08:40:13 · 7 answers · asked by PS 1

2007-12-26 08:30:41 · 5 answers · asked by D*Star 1

2007-12-26 08:29:40 · 10 answers · asked by Hayabusa 3

please explain in detail...thank you

2007-12-26 08:29:24 · 8 answers · asked by Anonymous

Given G=U(32)
and H= U_12(32)={1;17} then G/H is abelian group of order 16/2=8
which of the three abelian groups of order 8 is it
a)Z_8
b)Z_4 +Z_2
c)Z_2+Z_2

2007-12-26 07:56:31 · 1 answers · asked by Hynton C 3

The half-life if Actinium (227 Ac) is 22 years. What percent of a present amount of radioactive actinium will remain after 19 years?

2007-12-26 07:50:11 · 6 answers · asked by Anonymous

2. Use grouping to factor the polynomial completely: x^3+x^2-4x-4

3. Factor each polynomial cmpletely:6x^3y+30x^2y^2+36xy^3

4. Factor each Polnomial completely: 12t^3+14t^2+4t

5. Factor each polynomial: If prime stste so: 5max^2+20ma

6. Perform the indicated operation: 16a+8 / 5a^2+5 * 2a^2+a-1 / 4a^2-1

7. Perform the indicated operation: a^2+2a+1 / 3 / a^2-1/ a

8. Find the LCD for the given rational expression and convert each rational expression into an equivalant rational expression with the LCD as th e denominator: 3 / 8a^3b^9 * 5 / 6a2^2c
9. Perform the indicated operation. Reduce each anwer to lowest terms: 2a / a^2-9 + a/ a-3

10 Traveling Time. After leavig Moose Jaw, Hanson drove 200 kilometers at x km/hr and then discovered his speed by 20 km/hr and drove 240 additional kiloometers. Write a rational expression for his total traveling time . Evaluate the expression for x=100

2007-12-26 07:40:57 · 3 answers · asked by Anonymous

a -19
b 125
c 19
d 55

2007-12-26 07:39:29 · 3 answers · asked by Anonymous

It is a right triangle and please explain how to do it. Thanks!

2007-12-26 07:37:59 · 7 answers · asked by staciaschool2 2

rectangle is 4 times as along as it is wide. A second rectangle is 5 centimeters longer and 2 centimeters wider than the first. the area of the second rectangle is 270 square centimeters greater than the first. what are the dimensions of the original rectangle

2007-12-26 07:12:34 · 8 answers · asked by anthony s 1

2007-12-26 07:08:40 · 4 answers · asked by Anonymous

a 50
b 125
c 75
d 175

2007-12-26 06:57:38 · 5 answers · asked by Anonymous

From the information in the table providing values of f(x) and g(x), evaluate (f • g)^-1(2)

x 1 2 3 4 5
f(x) 3 4 5 1 2
g(x) 5 4 2 3 1
a. 1
b. 2
c. 4
d. 5

2007-12-26 06:49:42 · 2 answers · asked by katyS 1

2007-12-26 06:39:52 · 7 answers · asked by Anonymous

Example: 4!

And dont say it was a funny number or somthing stupid.

2007-12-26 06:37:37 · 6 answers · asked by angelicawalker123 3

2007-12-26 06:34:32 · 4 answers · asked by Anonymous

In a small rectangular, we're trying to find the height and width.
We only have the following data:

The diagonal is 7" (A=7)
And the Width is 0,6x the height (C=0.6xB)

What's the answer, and how do you get the answer?

Btw, this is no school task, this is just for me to calculate if the eeepc has a big enough screen for my liking.

2007-12-26 06:30:30 · 4 answers · asked by ProDigit 3

Please help! Is it [4,infinity) My teacher has written its is (0,4]

2007-12-26 06:25:40 · 5 answers · asked by Anonymous

I have a 1.333 and I have taken 16 classes.Is it possible for me to get a 2.0? I'm going to take 4 more classes, and I was wondering if I get A's in each class, is it possible for me to get a 2.0? HELP!

2007-12-26 06:25:23 · 4 answers · asked by Donnie W 1

Simplify the following:

3x2 + 4x + 3x2 - 4y

(5x - 2y) - (4x + 8y)

3x3(2x2)



(-6a3b4)2

(x + 9)(x - 9)

(3x - 7)2

(3x + 6)(4x - 7)

2007-12-26 06:10:35 · 3 answers · asked by Ashley A 1