Mathematics - 2 December 2007

Slove for x.

2007-12-02 13:27:19 · 16 answers · asked by catcherbabi82 1

2007-12-02 13:26:22 · 3 answers · asked by Jay 1

Rick invested $10,000, part at 10% and part at 12%. If the total interest at the end of the year is $1,100, how much did he invest at 10%?

2007-12-02 13:21:40 · 5 answers · asked by Anonymous

I NEED TO KNOW WHAT RELEVANT CONSTANTS MEANS FOR A PROJECT DUE TOMORROW!!

2007-12-02 13:21:18 · 1 answers · asked by ummm......... 2

Two lines are parallel. Do the equations of those lines represent a consistent system, an inconsistent system, or a dependent system? How many solutions will such a system have? Why?

2007-12-02 13:16:56 · 3 answers · asked by Anonymous

I been trying to figure out how to do this on a scientific calculator. Also how is done on a graphing TI83 calculator? Both techniques will be a plus.

2007-12-02 13:06:59 · 3 answers · asked by Spikey 1

Help is greatly appreciated. I'm not sure how to do these problems. Help in steps please. The (i) is not under the radical.

1.) (1 + √7i)(-2 - √5i)

2.) (2 + √-3)(-1 + √-12)

3.) Write an equation with solutions i and -i

Thanks everyone!

2007-12-02 12:59:41 · 1 answers · asked by deb3267 1

the problem was

63c2-7(the 2 is an exponent)
then i could see you can take 7 out of both of those so i did.
63c2/7 - 7/7
and put whats left in parenthesis
7(9c2) (once again 2 is an exponent)
then i factored it completely and got this
7(-9c)(+9c)


it doesnt seem right. help me please. =]

2007-12-02 12:50:09 · 4 answers · asked by Anonymous

it started out as 1x3-4x (the 3 is an exponent)
and i know you can take x out of both of those so i did this
1x3/x - 4x/x
and then i got to re write whats left with the x on the outside of the parenthesis.
x(????)

thats as far as i got :P help please!

2007-12-02 12:35:03 · 4 answers · asked by Anonymous

divide and simplify

2007-12-02 12:34:48 · 4 answers · asked by shakelia 1

I have this huge math project due for thursday about everything I learned math-wise so far in my life. I know of sin^(-1) (or asin) and cosec (csc) which is 1/sin. Since x^(-1) = 1/x, is sin^(-1) = 1/sin? If so, it would mean that sin^(-1) and cosec would both be the same thing right? Furthermore, I don't know how to label those functions. I would call them inverse functions but they would both have the same name. So, basically, are sin^(-1) and cosec the same? If not, how would you label them? Thanks, Seb

2007-12-02 12:34:29 · 1 answers · asked by Seb 1

Please tell me the answer and explain how you got it.

2007-12-02 12:30:44 · 8 answers · asked by vintagelove 2

2007-12-02 12:27:07 · 4 answers · asked by Anonymous

2007-12-02 12:23:57 · 8 answers · asked by ♥Ebonique♥ 2

2007-12-02 12:18:57 · 2 answers · asked by anonymous 3

1. The sum of two negative numbers is greater than either number.

2. The sum of two positive numbers is greater than either number.

2007-12-02 12:13:12 · 3 answers · asked by Anonymous

If Leah is 6 years older than her sister, Sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue?

i get so confused with these questions..please explain

2007-12-02 12:13:00 · 5 answers · asked by Anonymous

1.)Charles's law states that at a constant pressure,the volume of a fixed amount of gas varies directly with its temperature measured in degrees kelvin.A gas has a volume of 250 mL @ 300 degrees K.
write an equation for the relationship between volume and temperature.
2.)the amount of simple interest earned in a savings account varies directly with the amount of money in the savings account.you have $1000 in your savings account and earned $50 in simple interest .how much interest would you earn if you had $1500 in your savings account?

2007-12-02 12:11:38 · 6 answers · asked by Anonymous

2007-12-02 12:11:26 · 5 answers · asked by Corey 1

2007-12-02 12:10:40 · 5 answers · asked by emily d 1

i found the derivative to be dy/dx = - (2x + 2y)/(2x - 6y)
then i found the slope at that point to be equal to 1, which makes the slope of the normal -1
then i found the normal line to be y = -x + 2

do i set the curve equal to the line?
as in
x^2 + 2xy - 3y^2 = 0
and -y - x + 2 = 0
so
x^2 + 2xy - 3y^2 = -y - x + 2
i did this, then i tried to solve for y. i couldn't. i don't think i'm on the right track though.

so i guess, i'm not sure what to do after i get the normal line

2007-12-02 12:10:06 · 3 answers · asked by salmonella_jr 3

Please give examples with numbers.

2007-12-02 12:09:14 · 25 answers · asked by ♥Ebonique♥ 2

I need help with this math probem i cannot understand it:

Mia went downtown by bus, traveling at 60 km/h. She walked home at 6 km/h. Her total traveling time was 2.75 h. How far did she travel?

2007-12-02 12:09:14 · 11 answers · asked by |♥*/♥\*♥| 3

Determine the derivative of x^2 -xy +y^2 =7.
I did 2x - [ydy/dx + x] + 2ydydx = 0 and I know thats where I made the mistake.

So basically, can someone show me what I'm doing wrong? Thanks :)

2007-12-02 12:07:02 · 5 answers · asked by Maike Tater 2

Stephanie and Kaylee can finish apiece of work in 5 11/30 days. Stephanie can do the job herself in seven days. If Kaylee wanted to do the job alone, how long would it take her?
Answer :23 days

2007-12-02 12:06:20 · 5 answers · asked by janie 2

Stephanie and Kaylee can finish apiece of work in 5 11/30 days. Stephanie can do the job herself in seven days. If Kaylee wanted to do the job alone, how long would it take her?
Answer :23 days

2007-12-02 12:04:12 · 1 answers · asked by janie 2

I have to write a paper on this subject & I just need an idea of the whole question

2007-12-02 12:00:44 · 39 answers · asked by im_da_qween 1

I really need help. The first one:

6e^-0.07x = e^0.02x

The second one:

30(1.05)^x = 15e^x



Easy 10 points!

2007-12-02 11:54:50 · 4 answers · asked by Anonymous

A rectangle is bounded by the x-axis and the semicircle y=sqrt(25 - x^2). What length and width should the rectangle have so that its area is a maximum?

2007-12-02 11:52:42 · 3 answers · asked by Anonymous

Given f(x) = 5x2 – 3x + 1, find f(–9).

2007-12-02 11:45:17 · 8 answers · asked by Anonymous