Mathematics - 28 November 2007

I can't figure this bloody equation out!!! >=(

7x-5y=40
3x-2y=16

It looks easy but i can't figure it out...Show your work, please..

2007-11-28 06:50:11 · 3 answers · asked by Water Temple boss : Morpha 1

2007-11-28 06:46:27 · 16 answers · asked by Brook E 3

Theres 3 sections here i dont understand. Im not very good at math and this is over my head.

Simplify the following expressions by performing the indicated operations-
1. 3 (sqrt) x * 3 (sqrt) x
2. (sqrt) t * (sqrt) t
3. 3 (sqrt) R / 3 (sqrt) x

Express each of the following radical expressions using fractional exponents.
1. 4 (sqrt) x^2
2. (sqrt)t
3. 4 (sqrt) x^7
4. 1 / 5(sqrt) x^2

write these using only positive exponents (no signs inbetween except on #1 and #4 (division)
1. x^2 / y^-3
2. x^3 y^-5
3. x^2 y^-4 z^4
4.x^2 / y^-1/2
5. x^2 y^3 t^-4 z^-6 w

2007-11-28 06:45:34 · 4 answers · asked by Swavey 2

2007-11-28 06:40:54 · 9 answers · asked by Bill W 【ツ】 6

is the answer 6 0r square6

2007-11-28 06:40:08 · 6 answers · asked by thonia 1

1. what is the cube rood of 9x?

2. (12 x^1/2y^-1 / 27 x^-1y^-1/3)^-1/2

2007-11-28 06:39:05 · 2 answers · asked by Kitz 1

Angela worked a total of 45 hrs at mcdonalds and toys r us. she worked twice as many hrs at mcdonalds than toys r us. HOw many hrs did she work at mcdonalds? HOW DO YOU DO THIS??!?!?

2007-11-28 06:36:12 · 22 answers · asked by Anonymous

Provide a counter exampleforc each statement.

1.(n+2)3 =n3 +2 3 (I don't know how to make the numbers smaller, sorry)

Answer:

2. x2 > x for all values of x.

Answer:

Tell whether each statement is tru or false. if it is false, give a counterexample.

3.For every positive integer n,n2 +n +11 is a prime number.

Answer:


4.The result of multiplying the sum of the first n postive even integers by 4 and then adding 1 is always a perfect square.

Answer:

2007-11-28 06:35:57 · 3 answers · asked by Jackie 2

1. Two integers that are coprime are also prime.
2. If the sum of two complex numbers is real, the summands are complex conjugate of each other.
3. If the derivative of a function is increasing, the function is increasing.
4. If an integer is the product of two primes, then it has four distinct divisors.

2007-11-28 06:35:34 · 2 answers · asked by homeboy187nic 2

When your dealing with sin and cos,is it correct that the sin is your x axis and your cos is your y axis? Or is it the other way around?

2007-11-28 06:29:27 · 6 answers · asked by Anonymous

√2y+8=2√y

2007-11-28 06:28:54 · 2 answers · asked by robert78gdl 2

3√28+√63=

2007-11-28 06:27:51 · 2 answers · asked by robert78gdl 2

is the answer suare 6 0r 6

2007-11-28 06:27:37 · 5 answers · asked by thonia 1

1.A (X,Y) is the mid-point of BC. B is the point (x1,y1). Show that C is the point
(2X-x1,2Y-y1)

2.The variables x and y are thought to related by a law of the form y=ax(powerb) , where a and b are
constants.

(i) Using the data below, verify that this is to be the case
x=2 y=6.32
x=3 y=7.24
x=4 y=7.98
x=5 y=8.60
x=6 y=9.12

ii)Estimate the values of a and b , giving your answers to appropriate degree of accuracy.
(iii) Estimate the value of x when y =7.50 giving your answer correct to two significant figures
(iv) If one of the measured values ( x , y ) is (7.00, 9.00); determine the relative error in this
measured value of y , to 3 s.f.

2007-11-28 06:24:46 · 1 answers · asked by Anonymous

i am trying to research on gaming and wonder if anyone has already put bacarrat game into a form of mathematical question

2007-11-28 06:21:27 · 1 answers · asked by warrior 1

Question Details: 0 = x^3 + 4x + 3

help me please!!!! I don't know how to find the zero, or how after you do synthetic division I'm supposed to find the zero, and my Algebra II book does not explain it very well so help me please!!!!!!!

2007-11-28 06:10:48 · 7 answers · asked by Anonymous

find the coefficient of x^3 in the boinomal expansion of (1+2x)^8

i got the answer as 56?

2007-11-28 06:10:35 · 2 answers · asked by Anonymous

1,3,5,7

The first odd number can be expressed as
1=1²-0²

The second odd number can be expressed as 3=2²-1²

The third odd number can be expressed as
5=3²-2²

The fourth odd number can expressed as
7=4²-3²

Write down a formula for the Nth odd number and simplify this expression & prove that the product of two consecutive odd numbers is always odd.

could you show me how you did it aswell please? very confused!
xo

2007-11-28 06:07:20 · 2 answers · asked by Anonymous

sqrt 32m^3n^4p^6

2007-11-28 06:06:03 · 5 answers · asked by robert78gdl 2

I have a problem like : √45, and it shows it simplified to 3√5. How did they get that? Can someone please give me an explaination? And if I have a problem like: √169, how would that be simplified like the first one? Thanks.

2007-11-28 05:58:47 · 15 answers · asked by Anonymous

simplify (3x-2) (2xsquared -4)

i have done this and got it too 4x(squared) -10x - 8

could someone please check this for me :) thanks

2007-11-28 05:51:16 · 5 answers · asked by Anonymous

Can anyone make anything something more elegant out of this formula ? (without turning it into decimal)

2007-11-28 05:35:50 · 3 answers · asked by William B 2

for this kinda problem i just had to point out where the first mistake is made when the problem gets worked out. heres the rational expression.

problem: (6x)/(4y^2) times (y^3)/(x^2)
line 1[ (6x)/(4y^2) times (y^3)/(x^2) ]
line 2[ (6)/(4y^2) times (y^3)/(x) ]
line 3[ (6)/(4) times (y)/(x)]
line 4[ (6y)/4x) ]

which line did the mistake occur?

2007-11-28 05:26:22 · 6 answers · asked by Anonymous

2007-11-28 05:05:47 · 2 answers · asked by Anonymous

dy/dx = 1+x / xy^10; x>0
Use the following initial condition: y(1)=5
y^11 = ____________________

2007-11-28 05:00:01 · 2 answers · asked by simonkf2002 1

2007-11-28 04:56:14 · 7 answers · asked by Anonymous

any help would be great ,even if explaining a good way to do it.

here it is:
R = 4 to the power of 40 + 4 to the power of 1024 + 4 to the power of H.
What is the the largest number H can be so that R is the square of a whole number?

H and R are whole numbers.

2007-11-28 04:55:57 · 1 answers · asked by Anonymous

Sorry to ask another one, but this Calc class is killing me. So my question is:
Find the two values of k for which y(x) = e^kx
is a solution of the differential equation y"-17y' + 72y= 0.

I need to find the two values but I keep getting the wrong answers. Thank you for your help :)

2007-11-28 04:54:29 · 1 answers · asked by Graduation 2012 = :) 3

64 + 16L + 4M = 0 and 48+8L + M = 0

I have to find the value of M and L,
can somebody talk me through it please :) thanks

2007-11-28 04:48:07 · 3 answers · asked by Anonymous

solve each equations for y to get two separate equations that could be entered on a graphing calculator.

x^2+y^2=4
4x^2+y^2=9
3x-2y^2=1
i need some help solving these questions step by step. I dont need the answers, i just need to know how to solve these

2007-11-28 04:48:05 · 3 answers · asked by aznsoccerplaya 1