Friday

October 21, 2016
Total # Posts: 1,098

**algebra**

i have 2 solve by elimination an i keep gettin fractions when the answer is (-3,-3) my teacher gave me the answer an problem but she wants me 2 work it out idk how i keep gettin fractions the problem is: -3x-4y=21 8x-5y=-9 please help

*January 31, 2011*

**algebra**

o ok ty

*January 25, 2011*

**algebra**

3x+5y=0 2x-5y=-9 idk how 2 solve it then graph it my teacher eont help me plzz help

*January 25, 2011*

**chemistry**

Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?

*January 21, 2011*

**AiMS MATH **

i cant remember how to find the value of the squareroot of 484. can anyone give me some steps or something.

*January 20, 2011*

**AiMS MATH**

sorry accidently clikd submit

*January 20, 2011*

**AiMS MATH**

i cant remember how to find the value of the squareroot of

*January 20, 2011*

**AiMS MATH**

yeah. thx

*January 20, 2011*

**AiMS MATH**

-5 Is A Member Of Which Subset Of Real Numbers. a) natural numbers b) whole numbers c) intergers d) rational numbers e) irrational numbers

*January 20, 2011*

**algebra**

graph triangle rst with vertices r(-1,3),s(4,-2), t(2,-5) Draw the image triangle r's't' formed by rotating triangle rst 90 degree, 180 degrees, and 270 degrees about the origin. Give the coordinates of r',s', and t'.

*January 18, 2011*

**math graphing the y-intercept**

o ok thx

*January 12, 2011*

**math graphing the y-intercept**

the website helped but it don't have it for fractons how do i do it with fractions?

*January 12, 2011*

**math graphing the y-intercept**

it helps but how do i do fratcions?

*January 12, 2011*

**math graphing the y-intercept**

ty

*January 12, 2011*

**math graphing the y-intercept**

y=2/3=1 dont know how 2 solve it 2 get the y-intercept dont know how 2 graph it please help and explain it please

*January 12, 2011*

**math graphing the y-intercept**

2 y=- +1 3 dont know how 2 solve it 2 get the y-intercept dont know how 2 graph it please help and explain it please help

*January 12, 2011*

**math graphing the y-intercept**

y=2over3=1 dont know how 2 solve it 2 get the y-intercept dont know how 2 graph it please help and explain it please

*January 12, 2011*

**math**

o ok thx

*January 12, 2011*

**math**

8(4u-1)-12u=11(2u-6) 32u-8-12u=22u-66 -12 20u-8=22u-66 -20u -8=2u-66 -8 2u=74 u=37 i kno 1 messed up but idk where

*January 12, 2011*

**Spanish 1-Please check and help **

no problemo

*January 12, 2011*

**math algebra 1a&1b**

ty

*January 12, 2011*

**math algebra 1a&1b**

the problem is 2(9n-1)+7(n+6)=-60 i get how 2 do it but i get confused on wat 2 do and then i get mixed up and mess it up please help

*January 12, 2011*

**math**

the lenght of the hypotenuse of a right triangle is 4cm. the lenght of one leg iz 2m. find the lenght of the other leg.?

*January 5, 2011*

**math**

i thought you had to substract when you have to find the hypothenuse.? and add when you need to fid the lenght of a leg.

*January 5, 2011*

**math**

what is the lenghts of the hypothenuse if the lenghts of the legs of a right triangle are 5cm and 12cm.?

*January 5, 2011*

**MATH please help!**

which set is infinite? P = {positive numbers less than 60} Q = {whole numbers between 10 and 20} R = {intergers ge=reater than 18} S = {even numbers between 5 and 15} P, Q, R, or S

*December 13, 2010*

**Aims Math**

what is the contrapositive of this statement "If two polygons are congruent, then they are also similar"

*December 13, 2010*

**Physics**

Consider the resonant frequencies of a 1.78 m tube closed at one end at 24°C. a) Lowest resonant frequency = Hz HELP: You know the length of the tube. What else do you need in order to calculate the frequency of the lowest resonance of a tube that's closed at one end? ...

*December 9, 2010*

**Physics**

Ultrasound reflected from an oncoming bloodstream that is moving at 30 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat frequency = Hz HELP: This problem involves two Doppler shifts...

*December 9, 2010*

**HSM/220**

Why does it seem like nobody wants to help with this problem? I am lost here too, a simple answer could help soo many people!

*December 6, 2010*

**College math**

Analyze x²-6x-5y=1. Determine the vertex, focus, directrix, intercepts, axis of symmetry, and at least 2 other points on the graph.

*December 6, 2010*

**college**

Old Hickory rolled into Washington with such force that an era is named after him. Ending years of what he (and many Americans) considered to be elitist government, Jackson threw open the doors of power to the people, and remade the executive branch in the process. Previous to...

*December 4, 2010*

**statistics**

A large number of samples of size ‘n’ are selected from a population and the mean of each sample is determined. What can be said about the mean of the sample means

*December 4, 2010*

**music**

my school subject is music

*December 4, 2010*

**math**

multply to find an equivalent fraction 3/4

*December 3, 2010*

**Physics**

A cooling fan is turned off when it is running at 920 rev/min. It turns 1100 revolutions before it comes to a stop. What was the fan's angular acceleration? How long did it take the fan to come to a complete stop?

*November 29, 2010*

**Math**

Please help! x-2y+z=7 2x+y-z=0 3x+2y-2z=-2 a. Solve the above system of equations using Gaussian Elimination or Gauss-Jordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule.

*November 17, 2010*

**Qestion bout WH**

how can i get a better gradfe wen i cant remember all the stuff only bits and pieces

*November 16, 2010*

**Math**

4/5+8/15=

*November 12, 2010*

**Math**

7+(v+w)

*November 12, 2010*

**Math**

12;8t=96

*November 12, 2010*

**9th grade**

How long was Romeo and Juliet married before the prince exiled Romeo?

*November 11, 2010*

**Romeo and Juliet**

How long was Romeo and Juliet married be4 the prince exiled Romeo?

*November 11, 2010*

**9th grade Social Studies**

i also have problems studying and understanding social studies. i don't know what to do my grades are way low. can you please give me some tips and ideas on how i can work on it?

*November 10, 2010*

**A thanks to Writeacher**

k i will

*November 10, 2010*

**A thanks to Writeacher**

THANK YOU lol thank you very much i now understand wat shes sayin myteacher don't really get it either lol wen i asked him in class so thank you very very much

*November 10, 2010*

**English (Romeo and Juliet)**

thx ms sue

*November 10, 2010*

**English (Romeo and Juliet)**

Where juliet says: "O romeo, romeo!Wherefore art thou Romeo? Deny thy father and refuse thy name; Or if thou wilt not,be sworn my love, And ill no longer be a Capulet" i don't understand what she is sayin and i don't understand what she means

*November 10, 2010*

**math**

you can put the matrices into your calculator, if a calculator isnt available you can easily do them out by hand

*November 7, 2010*

**5th gr ade social studies**

what is the fact of Each European gropup that set up colonies settled in a specific part of the Americas.

*November 7, 2010*

**physics**

F2 is straight up at a 90 degree angle to the x axis, and F1 and F2 form an 120 degree angle

*November 7, 2010*

**physics**

The two forces F1 and F2 act on a 27-kg object on a frictionless tabletop. If F1 = 7.1 N and F2 = 33 N, find the net force on the object and its acceleration. WHAT IN the world...how do i figure this out!

*November 7, 2010*

**5th grade social studies**

describe the geographical features of your community or region. How might they have influenced people to settle there?

*November 7, 2010*

**Physics**

How do you calculate the energy needed to heat 4 kg of water from 25oC to 45oC?

*November 5, 2010*

**Chem**

That was all the question gave me I can not figure out how to get the correct answer.

*November 4, 2010*

**Chem**

or is 44kJ correct?

*November 4, 2010*

**Chem**

What is the enthalpy for the following reaction? overall: C2H4+H2O--->C2H5OH is -1411kJ correct??

*November 4, 2010*

**Chemistry**

A 455-g chunk of iron is removed from an oven and plunged into 385g water in an insulated container. The temperature of the water increases from 27 degrees celsius to 89 degrees celsius. If the specific heat of iron is 0.449 J g^-1 degrees Celsius^-1, what must have been the ...

*November 4, 2010*

**algebra 2**

Factor: 27X^2-90X+27

*November 2, 2010*

**Algebra**

I'm soo confused on how to solve this prboblem. x+5/8x-3 = 11/2

*October 24, 2010*

**english**

Can someone please show me an example of alliteration and small definition?

*October 24, 2010*

**Algebra**

(x-6)^2=1? Give exact and approximate solutions to three decimal places

*October 22, 2010*

**CALC**

why is the surface area of a cube not the derivative of a volume?

*October 7, 2010*

**Physics**

Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of the engine is maximized? How much work was &#...

*October 7, 2010*

**Physics**

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x 10-8 m3. b) Water is in ...

*October 7, 2010*

**Physics**

Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of the engine is maximized? How much work was &#...

*October 7, 2010*

**Physics**

Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of the engine is maximized? How much work was &#...

*October 7, 2010*

**Physics**

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x 10-8 m3. b) Water is in ...

*October 7, 2010*

**Physics**

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x 10-8 m3. b) Water is in ...

*October 7, 2010*

**Physics**

Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of the engine is maximized? How much work was &#...

*October 7, 2010*

**Chem**

NO3 is always soluble though. It doesn't mix with Na (which is also always soluble).

*October 6, 2010*

**social studies**

vocabulary an area that has one or more features in common.

*September 29, 2010*

**math**

i need the magic square from the follow numbers 3,4,5,6,7,8,9,10,11

*September 15, 2010*

**math**

what are2 ways to write 67,000 in word form

*September 15, 2010*

**Biochemistry**

Sorry! HEPES, is a commonly used component of physiological buffers. The PKa of the protonated amino group of HEPES is 7.55 at 25C. Describe the preparation of 1.00L of 0.100M HEPES buffer, pH 8.00, from the sodium salt of the basic form of HEPES (MW 260.3), 6.0M HCl and ...

*September 14, 2010*

**Biochem**

HEPES, is a commonly used component of physiological buffers. The PKa of the protonated amino group of HEPES is 7.55 at 25C. Describe the preparation of 1.00L of 0.100M HEPES buffer, pH 8.00, from the sodium salt of the basic form of HEPES (MW 260.3), .0M HCL and deionized water

*September 13, 2010*

**Chemistry**

I'm completely confused on how to solve this problem. Convert 125 hp-hr/long ton to kW-s/kg.

*September 12, 2010*

**Chemistry **

I'm completely confused on how to solve this problem. Convert 125 hp-hr/long ton to kW-s/kg.

*September 12, 2010*

**Algebra**

Thank You

*September 11, 2010*

**Algebra**

Write the equation of the function that has a graph the shape of y=/x/ ,reflected about the x-axis and shifted down 1 unit.

*September 11, 2010*

**geometry**

If EF = 2x – 12, FG = 3x – 15, and EG = 23, find the values of x, EF, and FG. The drawing is not to scale.

*September 8, 2010*

**english**

Can you hlp me with my figative lang. and it has to be about me

*September 7, 2010*

**geometry**

measure of angle RST=5(x+1)-3

*September 6, 2010*

**Intermediate Algebra **

I'm even more confused then before.

*September 1, 2010*

**Intermediate Algebra **

Factor: 9x^2 - 42x + 49 So far I have 3(3x^2 - 14x + ) I have no idea if this is right or if this equation is prime. Or if I'm solving it correctly.

*September 1, 2010*

**algebra**

For which value of x is the inequality 2x > 6 true? Is it: 0, 1, 2, 3 or 4

*August 31, 2010*

**science true or false**

false

*August 29, 2010*

**biochemistry**

The R-group of histidine is a weak base with a pKb of 6.0. Calculate the percent ionization at pH 7.4. What is the net charge of the following amino acids (single letter codes used) at pH7.4? Glycine Serine Glutamic Acid Lysine Please help. I'm not sure how I'm ...

*August 28, 2010*

**math**

which of the following expressions shows the equation to use in the finding the dimensions of a cube N by N by N with a volume 125 1) n3=125 2) n2=125 3) 3n=125 4) n=125/3 5) not enought info given need help with this problem!!

*August 24, 2010*

**us government cp **

what are the qualificalions to be a cadidate for governor?

*August 1, 2010*

**calculus**

no answers yet?

*July 31, 2010*

**Developmental Psychology**

There are a number of ways that emotional or psychological problems can develop in children. Problems can result from anything that disrupts a child's sense of safety and security. This could include things such as an unstable or unsafe environment, separation from a ...

*July 26, 2010*

**math**

At a carnival, there is a game where you throw a coin on a colored square. You are given 3 coins and can land on any square more than once. What is the probability of landing on a red square on your first toss, a red square on your second toss, and a white square on your third...

*July 23, 2010*

**Health**

During an emergency room examination for an injured arm, the physician palpates the arm's entire lengh, starting at the shoulder and ending at the fingers of the hand. THis process takes him from a/an------ position.

*June 28, 2010*

**Business**

How has the control mechanisms impacted the four functions of management in the Coca Cola Corporation?

*June 24, 2010*

**Chemistry**

Solubility of a solute X is 20 g / 100 g of water at 450C and 10 g / 100 g of water at 250C. What happens when a solution of 15 g of X in 100 g of water at 450C is cooled to 250C.

*June 24, 2010*

**Chemistry**

Why is ∆H hydration a negative quantity for ionic compounds?

*June 20, 2010*

**chemistry**

Consider two beakers, one with water and other one with sodium chloride solution. Which of these will have higher vapor pressure

*June 20, 2010*

**math**

in each game there are 12 red checkers and 12 black checkers.If tom put all the checkers in the bag and randomly picked 2,what is the probability that both will be black?

*June 7, 2010*

**business**

Tomlinson, in Cultural Imperialism: a Critical Introduction, London: Pinter Publishers, 1991, suggests that certain dominant cultures threaten to overwhelm other more vulnerable ones. He argues that cultural imperialism gathers in a number of fairly discrete discourses of ...

*June 6, 2010*