Mathematics - 6 August 2007

#1. Divide and Simplify
21x^3 - 50x^2 - 65x - 14 / 7x + 2

#2. Solve. There May Be No Solution
t^2 + 12t = 0

#3. Subtract
(xy - ab - 8) - (xy - 3ab - 6)

#4. Solve
c^2 + 2c - 8 = 0

#5. Add and simplify.
(4x^2 - 3x + 27) + (7x^2 + 5x - 56)

2007-08-06 12:31:30 · 3 answers · asked by Anonymous

Complete the factoring.

5x^2 - 24x - 36 = (x - 6)(___________)

2007-08-06 12:24:29 · 6 answers · asked by It's just me 1

2007-08-06 12:10:42 · 4 answers · asked by Anonymous

what's the diff b/w fraction 2/3 and repeating decimal 0.39393939 in terms of a fraction?

2007-08-06 12:09:15 · 5 answers · asked by Olivia R 1

know how?

2007-08-06 12:05:21 · 9 answers · asked by Brandon SmackDaddy 1

FIND THE ERROR!! ITS IMPOSSIBLE!!

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Did you know that 80% of UCSD students
could not find the error above? Repost
this with the title "Find the error, its impossible.",
and when you click "Submit Post", the
answer will be really obvious

2007-08-06 12:01:25 · 9 answers · asked by Anonymous

Find the exact numbers a and b which make the following identity true:

sin(pi/2-x)=acosx+bsinx

A brief description of answer and process would be great. Thanks guys/gals!

2007-08-06 11:59:23 · 3 answers · asked by cac_424 1

the % P of physicians using a new medication after t months is given by P(t) = 100% (1-e^-.2t)

I need to find out what percentage of physicians are using the medication after 1 month, and the rate of change P'(t)

can anyone help

2007-08-06 11:53:26 · 2 answers · asked by jake p 2

The formula I have to go by with the ABYC is normally 3.142xR² to know the circle's circumference, but what I am having a hard time with is this, doing it in reverse. Ok, here's where I come into the Land of Confusion (a great Phil Collins/Genesis song btw). Let's say to find the circumference of an 8 inch circle I go with (R)4² = 16 * 3.142 = 50.27 inches. But in reverse by dividing 16 by 3.142 I get 5.1 as my radius.

The reason why I need to know this madness, is that I am trying to find out what a non-circular geometrical shape's circular diameter. For example, a triangle with three sides of equal size (3 inches) would give me the circumference reference of the circle, but not its diameter.

I must have slept in my Geometry class back in 1985 and missed this one. Proofs and Theorims were my bane of existence in those horrible days of mullets running amok!

If you can show me the correct formula, you will earn 10 brownie points. :) Everyone loves brownies right?

ty

2007-08-06 11:49:04 · 10 answers · asked by Anonymous

More precisely, show that, for every n >=2, 1 + 1/2 +....1/n is not an integer.

Thank you for any help.

2007-08-06 11:42:58 · 3 answers · asked by Anabela 1

2007-08-06 11:10:08 · 7 answers · asked by fmontes92 2

in johnny english.bough says the man is talking gibberish.whta is gibberish

2007-08-06 11:07:08 · 6 answers · asked by Anonymous

Find the least common denominator for each group of rational expressions.


5 over 18x^2y^3 , -3 over 24x^4y^5


9 over k+3 , 3 over k


17 over 3r-21 , 9 over r-7


x over x^2 - 81 , 3x over x^2+18x +81

2007-08-06 10:41:06 · 1 answers · asked by Anonymous

2007-08-06 10:22:59 · 2 answers · asked by booboobear_619 1

2007-08-06 10:21:32 · 3 answers · asked by booboobear_619 1

best step by step gets 10 points

-6 + x^2 - 5x
so how would u arrange it so it would be like
ax^2 + bx+ c??? and not

-c + ax^2 - b
thanks

2007-08-06 10:17:50 · 3 answers · asked by Anonymous

I understood the first problem, but this one is stumping me. Here's the math problem:
In the period of a year, an investor lost twice as much as he gained. If he originally had $10,000 and now has $8000, what amount did he gain and what did he lose?

2007-08-06 10:12:22 · 8 answers · asked by Nerds Rule! 6

y" - 2y = 0

how do you do with second derivative?

2007-08-06 10:09:08 · 2 answers · asked by jessica y 1

what is the definition of bearing in trigonometry?

2007-08-06 10:04:13 · 2 answers · asked by Laurize 1

The top length of the container is 145", the bottom length is 38", the width of the container is 31", and the height is 39".

2007-08-06 09:07:59 · 6 answers · asked by Steven B 1

I was soo expecting an A for my class, I don't understand how I got a B. My teacher provided me with the syllabus as an explanation, but that still doesn't help me: Here are my grades:

84.78 -- Test 1
60 -lowest grade is dropped --Quiz 1
62.5 --- quiz 2
100 ---quiz 3
87.5 --- Test 2
100 --- quiz 4
89.47 ---Test3
80 ---- quiz 5
100 ---- quiz 6
70 ----- quiz 7
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774.25/9 = 86.02 without extra credit points and/or
extra 10 points for being the only person to make 100% on quiz 3.
Extra credit is worth 3-5 points per question and I did 21
questions, so even if I only got the minimum of 3 points for each question I should still get atleast a 90 which is an A.
So I'm really not sure how my average/grade turned out
to be 87.27%

Quizzes = 40%
Tests 1, 2, 3 = 30% each

So can you please help me figure out what my grade should be. Is it really a B?

2007-08-06 09:06:13 · 11 answers · asked by TCM 3

Ok...so for this I am given: f(x)= x^3+11x^2+39x+29 and they want me to find the zeros and write the polynomial as a product of linear factors. We just started this chapter today and no one has any idea how to do this!

2007-08-06 08:14:58 · 4 answers · asked by Kaylen L 1

2007-08-06 07:54:29 · 1 answers · asked by STORMY K 3

Regarding the hyperbola 4x^2 + 16x - y^2 + 18y +43 = 0.

Specify the vertices, foci, center, and equations of asymptotes. Give the equation in standard form. Leave the points as exact answers, express the asymptotes in slope intercept form...


omg...i'm way in over my head here....please someone help me out ...thank you for your time =)

2007-08-06 07:41:45 · 5 answers · asked by Lil Jon 4

2007-08-06 07:22:46 · 4 answers · asked by rohn 1

a ball is dropeed from a height of six feet and begins bounsing up and down. the height of each bounce is 3/4 the height of the previous bounce. find the total vertical distance traveled by the ball.(HInt- series problem. write a narrative and include the series use with notaion

2007-08-06 07:15:36 · 3 answers · asked by kareena 1

Problem:
The volume of a rectangular box is 12cm^3. It has a square base and its height is 1 cm more than its width. Find the dimension of the box.

Assumptions:
let x=measurement of one side of the square base.
and x+1cm= the height

Since the volume of a rectangular box is LWH. L=W because it has a square base. My solution would be:
LWH=12cm^3
x*x(x+1cm)=12cm^3

Then,
x^3 + (x^2)cm =12cm^3
x^3 + (x^2)cm = 12cm^3
x^3 + (x^2)cm - 12cm^3=0

I don't know what will be the next step....

Are my assumptions and solution wrong?
Could anybody give me any alternative way on solving this problem. Thanks alot again. =D

2007-08-06 07:02:41 · 9 answers · asked by Wonder_Boy 2

If someone out there could help me figure out how to convert 10 grams of antibiotic(for Birds)and help me figure out how to covert one litre of water into a standard measurement, I (and Birdies) would be extremely grateful.!!!

2007-08-06 07:01:25 · 4 answers · asked by RowanSilverSkye 4

1. Find Domain And Range Of
y = 4*(2^x)......4 times 2 to the x power

2. Find Domain And Range Of
y = 2 / (x-1), for -5<=x<=4

2b. what will the value of y never be?

2007-08-06 06:41:09 · 3 answers · asked by Anonymous

I spent my years at school arsing about and copying my mates work....
Now I am 30 and need to know how to multiply and divide...
Anyone know where there are any self teaching guides on how to do it...??
I mean i can do basic stuff by adding and subtracting but if you asked me what 58 x 32 was or 78 / 23 then i wouldnt have the foggiest idea how to work it out!!
Help???
I need to learn this and have it lodged in my brain by next week!!

2007-08-06 06:33:38 · 11 answers · asked by JustJem 6