Mathematics - 3 December 2007

Okay.. these are super simple but hard for me to concetrate at the same time .. please help..

What is the domain and range?

y = 25(-7x - 4)^(64)

y = (x^2)/(x^2-16)

y = 98(-6x - 5)^2

I think the answer for all of these is Domain = {all real numbers}, Range = {all real numbers}
Am I right... if not PLEASE explain

2007-12-03 10:07:01 · 3 answers · asked by Jaz 'ma' Taz 2

Use the identities for (sin A + sin B) and (cos A + cos B) to prove that:

(sin2x + sin2y)/(cos2x + cos2y) = tan(x + y)

2007-12-03 10:06:34 · 2 answers · asked by Anonymous

Algebra 1 help...?
What is the range of the given relation?
[(2,2), (3,2), (2,3), (1,4)]
----------------------

I don't understand what the question is asking...I don't know what a relation is. I do know about x and y values, though. Thanks in advance!

2007-12-03 10:05:55 · 4 answers · asked by Lindsay 3

the subject is td technical drawing

2007-12-03 09:50:17 · 1 answers · asked by channy not fanny 1

1) y^3 - 64

2) y^3 - 64

3) b^3 + 8

4) 81y^2 - 121

2007-12-03 09:43:44 · 2 answers · asked by Rachel 2

2007-12-03 09:43:11 · 3 answers · asked by Anonymous

It says I have to write a statement of the trigonometric ratio being described. I don't really understand it. So could someone please help me? It's REALLY appreciated. :)

2007-12-03 09:40:31 · 2 answers · asked by Shippo V 1

Using exponents write the prime factorization of :

42 , 120, 48, and 63


answers ONLY easier for you!!
help fast pleaseeeeeeeeeeeeeeee!!!!!!! Thanksss Ill give the correct answer great feedback!!! help :-)

2007-12-03 09:40:11 · 6 answers · asked by Anonymous

I cant remember the equation to find distance speed and time. What is it?

2007-12-03 09:39:55 · 7 answers · asked by Anonymous

7 people met at a business meeting. Each person shook hands with every other person. How many handshakes was exchanged?
Please explain how to do this. I think it is either Combination or permutation, Thanks!

2007-12-03 09:33:15 · 10 answers · asked by the worr e ore 5

please provide correct answer and explanation

Two players take turns throwing a die. The first one to roll a one wins. How big is the first players advantage? What are the probabilities of winning for each of the two players?

2007-12-03 09:21:23 · 7 answers · asked by dunnohow 4

2007-12-03 09:18:05 · 13 answers · asked by Mina203 2

CAN SOMEONE PLEASE GIVE ME THE ANSWER TO THE SUM ABOVE.

2007-12-03 09:17:25 · 10 answers · asked by Anonymous

solve and check equation for x.

5/x+6 + 2/x^2+7x+6 = 3/x+1

2007-12-03 09:15:25 · 1 answers · asked by God Bless America!~ 4

2007-12-03 09:14:08 · 1 answers · asked by Anonymous

Can someone help me solve this quick?


4x^2 + y^2 - 8x + 4y + 4 = 0

i need to put this into ellipse equation form where x^2/a^2 + y^2/b^2 = 1

2007-12-03 09:13:04 · 1 answers · asked by Anonymous

If the rate of growth of cancer is modeled by: N'(t)=Ae^kt ; where A=rate at time= 0 days and K=a constant:
a) Suppose A=50 and at t=5 days, the cells are growing at a rate of 250 cells per day; find a formula for the number of cells after t days given that 300 cells are present at the beginning of this study.

b) Use this formula to calculate the number of cells that should be present after 12 days.

2007-12-03 09:06:54 · 1 answers · asked by Audre 1

Dmitri needs 7 liters of a 29% solution of sulfuric acid for a research project in molecular biology. He has two supplies of sulfuric acid solution: one is an unlimited supply of the 35% solution and the other an unlimited supply of the 14% solution. How many liters of each solution should Dmitri use?

a. 35% solution: 2 liters; 14% solution: 15 liters
b. 35% solution: 5.5 liters; 14% solution: 1.5 liters
c. 35% solution: 4.5 liters; 14% solution: 2.5 liters
d. 35% solution: 5 liters; 14% solution: 2 liters

2007-12-03 09:00:52 · 3 answers · asked by . 1

x^2 + y^2 = 4

ok , so here is my work. well, sort of. I did it in my head since it's a easy one. LOL.
dy^2/dx = -2x

so from here, do we take a square root for both sides?

2007-12-03 08:58:16 · 3 answers · asked by Anonymous

{-7y = x + 44
{2x + 6y = -32

a. (5, -7)
b. (-5, -6)
c. (4, -6)
d. no solution

2007-12-03 08:57:15 · 2 answers · asked by . 1

2007-12-03 08:45:10 · 5 answers · asked by Anonymous

2007-12-03 08:41:15 · 3 answers · asked by Anonymous

2007-12-03 08:40:58 · 9 answers · asked by ilovesoccer 1

1)
x = 7
2x + 6y = 44
-x + 7y - 2z = 22

2)
x = 3
5x + 4y = -9
-x + 4y - 2z = -25

2007-12-03 08:40:10 · 1 answers · asked by wrongnumber 1

The third term of an arithmetic sequence is 58 and the sixth term is 139. 2 marks.
a) What is the common difference?

b) What is the first term?

2007-12-03 08:38:40 · 2 answers · asked by John Cikkaaaaa 1

What is my final grade for my class if this is how he grades?
1) Introductory Assignment: 2% of total grade.
2) Four exams: 20% each, or 80% of total grade.
3) Writing Project 18% of total grade

Here are the grades....
Writing Project (Out of 100.00) 100.00
Introductory Assignment (Out of 100.00) 100.00
Exam 1 (Out of 99.90) 85.10
Exam 2 (Out of 100.00) 80.00
Exam 3 (Out of 99.84) 94.36
Exam 4 (Out of 100.00) 64.00

2007-12-03 08:27:20 · 4 answers · asked by curt 1

0 x (any numerical value) = 0
undefined x (any numerical value) = undefined
0 x undefined = ?????

2007-12-03 08:25:43 · 8 answers · asked by Heero 2

I have a question that asks to find the length and width of an object with an area of 108 sq feet and a diagonal mesurement of 15 feet. I know it needs to be solved as a system. This is what I have
xy=108
x^2+y^2=15 (should it be ^2 also?? or is it already?) help!!
So sub one equation into the other, which, how ect. Thanks

2007-12-03 08:24:03 · 2 answers · asked by Happy Killa Pants 2

Would the 7 become 49 in this equation?

5x^3(7x)^2

I have a test tomorrow and I was just wondering... would the ^2 distribute to the 7 and the X or just the X?

Thanks so much!

2007-12-03 08:21:12 · 3 answers · asked by Claire 4

Right now I'm pursuing a bachelors in math, and plan on getting a masters afterward.
What kind of salary can I expect to make teaching at a junior college?
Am I going to end up a hobo-mathematician?

2007-12-03 08:20:46 · 4 answers · asked by Burton 1