Monday

April 27, 2015

April 27, 2015

Total # Posts: 653

**Algebra**

sorry i messed up ou have to multiply the seven too
*September 15, 2009*

**Algebra**

multiply each side by 6, which wuill cancel out the 6 on the left side of the equation, and on the left you will multiply 2/3 and 6, giving you 4. now you have m-7=4 add 7 to both sides, giving you m=11
*September 15, 2009*

**math analysis**

Go to Y= and type in your f(x)= and go to second, graoh and look for the zero in the y1 column
*September 15, 2009*

**Algebra**

52,955
*September 15, 2009*

**AP chemistry**

Sodium azide, the explosive chemical used in atuomobile airbags, is made by the following reactions: NaNO3 + 3NaNH2 => NaN3 + 3NaOH+ NH3 If you combine 15,0 g of NaNO3 (85 g/mol) with 15.0 g of NaNH3, what mass of NaN3 is produced?
*September 15, 2009*

**Math**

I don't understand what you mean by the commas v=(0,-590)?
*September 12, 2009*

**Math**

An airplane is heading due south at a speed of 590km/h. If a wind begins blowing from the southwest at a speed of 65.0km/h (average). Calculate magnitude of the plane's velocity, relative to the ground. Calculate direction of the plane's velocity, relative to the ...
*September 12, 2009*

**Math**

A boat, whose speed in still water is 2.80m/s , must cross a 280m wide river and arrive at a point 120m upstream from where it starts. To do so, the pilot must head the boat at a 45.0 degrees upstream angle. What is the speed of the river's current?
*September 12, 2009*

**palmerston**

the trees bent in the wind.(and) their leaves fluttered. need to join these sentences together by using and
*September 7, 2009*

**home economics**

name 12 careers in home economic management
*September 6, 2009*

**Math (pls help)**

write the number in expanded form. 1) 46,182 2) 20, 397
*September 5, 2009*

**foreign language**

How do I translate this poem into English (it's in portuguese)? Eu queria você perto de mim Queria poder abraçar com todo meu carinho A gente se encontra apenas nos sonhos Por que a gente é tão feliz nos sonhos? Sempre vejo a gente sorrindo, se ...
*July 29, 2009*

**Finite Math**

Use the formula m=(y2-y1)/(x2-x1)
*July 23, 2009*

**physics**

our class was given an extra credit assignment where we have to design a mobile that has both the net forces and torques = 0. i have all of the masses know i just don't know how to find radii. no two masses can be in the same position nor can they be at the center of mass...
*July 3, 2009*

**budgets and forcasting**

How are budgeting systems used to weigh the efficiency and effectiveness of a health and human service agency? Why is this important?
*June 25, 2009*

**financial management**

What is the basic accounting formula?
*June 7, 2009*

**english**

I need help finding metaphors and assonances in 5 poems? I Played a Game I played a game. I rode my bike. I had a snack. I took a hike. I read a book. I watched T.V. I built a fort. I climbed a tree. I surfed the web. I played guitar. I caught a bug inside a jar. I called my ...
*June 5, 2009*

**pre-algebra**

I have two questions about finding the slope of a line. First question: Is the formula Y2-Y1 over X2-X1? Second question: When I am given a line on a graph, how do I find Y1, Y2, X1, X2 to use in finding the slope?
*May 16, 2009*

**Chemistry**

Every balanced equation is written so BLANK is/are conserved atoms mass a and b None of the above I thought the answer would be matter, but that's not an option. What would it be then? Thanks!
*April 20, 2009*

**English**

1) I heard him say that... Please explain the grammar rules for "say" (present tense) after the word "heard". 2) A Economic Development Board survey... Why is it "a" not "an"? Is it because it is "a survey"? 3) A historic ...
*April 4, 2009*

**Chemistry**

We say that an ionic bond is the electrostatic force of attraction between oppositely charged ions. What does electrostatic mean?
*April 1, 2009*

**Chemistry**

Is sulphuric acid covalent? Please explain. Thanks.
*March 22, 2009*

**Chemistry-confused**

I am rather confused. Is sand considered a mixture or a compound? Some have said it is a compound because it is silicon dioxide. Others have said it is a mixture because it is impure silicon dioxide. So...?
*March 21, 2009*

**Chemistry-help**

What is the chemical equation for the reaction between iron and sulphur to produce iron sulphide? Do we write sulphur as S or S8?
*March 20, 2009*

**Science**

Do potato cells have chloroplasts?
*March 20, 2009*

**Health**

The most serious type of allergic reaction? a.atrial fibrillation b.psoriasis c.anaphylaxis d.lupus
*March 20, 2009*

**Chemistry-please help**

Can calcium react with chlorine gas to give calcium chloride?
*March 19, 2009*

**stats**

chi square for independence 1) my obtained value does not exceed the critical value, I will reject the alternate and accept the null. Do I state that the results is due to chance and there is no relationship between the variables.
*March 6, 2009*

**chemistry**

I read in a book that gas particles move rapidly in all directions. Somehow I find that random directions is better.The word "all" sounds a bit weird. What do you think?
*February 9, 2009*

**Chemistry-help needed**

1) Does Alumnium react with steam to give metal oxide and hydrogen gas? 2) Does Aluminium react with dilute hydrochloric acid? What are the products? 3) Will Tin react with dilute hydrochloric acid to give tin(II)chloride and hydrogen gas?
*January 28, 2009*

**Science**

"Blow up a balloon and tie it up. Leave it for a few days. After a few days, the balloon becomes smaller.Why?" The answer given is that the air particles diffuse out of the balloon. Can you please explain the answer? I understand that diffusion involves particles ...
*January 28, 2009*

**science-chemistry**

For diatomic molecule, must the 2 atoms be of the same element, e.g H2?Is CO a diatomic molecule?
*January 27, 2009*

**Science**

1) Instead of using the word "random",is it acceptable to say particles in a liquid move about in "different" directions? 2) Why does ice have a higher density than water vapour? Is it because ice has a greater mass in a fixed volume? 3) The statement "...
*January 26, 2009*

**Science-Chemistry**

1)Fill in the blanks. In a liquid, particles are _____arranged. They move about in ____ directions and slide over one another. Can I say "irregularly" & "any" as the answers? I know "random directions" is better, but can we accept "any ...
*January 26, 2009*

**chemistry**

thank you.
*January 22, 2009*

**chemistry**

In an atom, there is a force that holds the protons & neutrons in the nucleus. Is this force called the nuclear force? What about the force of attraction between the nucleus and electrons? Is is called the electrostatic force of attraction?
*January 22, 2009*

**Chemistry**

If you look at the Periodic Table,you will see chlorine with a relative atomic mass of 35.5. That means the average mass of a chlorine atom found in nature is ________?
*January 22, 2009*

**Home School. PLEASE HELP ME!!**

4. is A its on page 36
*January 19, 2009*

**computers**

I was wondering if anybody could please tell me what I need to do I went to work on my power point project and when I turned on my computer a lot of my icons were missing such as my excel power point microsoft office 2007 my documents pictures my back ground ( wall paper is ...
*January 16, 2009*

**Physics**

What are the differences between a motor and a generator? I know they both use electromagnets, but how do they use them differently?
*January 10, 2009*

**Physics**

If the current in a wire is 0.1A, how long will it take for 10C of charge to pass through it?
*January 3, 2009*

**natural logs**

can't use a graphing calculator (not allowed). I'm trying to find the area between curves, if that helps.
*December 19, 2008*

**natural logs**

Solve for x: ln(x+1)+ 2 = x^2 – 8x + 12
*December 19, 2008*

**African and Hispanic Studies**

What is Jim Cummins' "Intervention Model" all about. Present the elements of this model and in your opinion, can it be successful in reversing the history of failure the Puerto Rican children have experienced in the American schools? Illustrate some of the ...
*December 17, 2008*

**PHysics**

a 15g bullet strikes and becomes embedded in a 1.1kg block of wood placed on a surface in front of the gun. if the coefficient of kinetic friction between the block and the surface is 0.25 and the impact drives the block a distance of 95m before it comes to rest, what was the ...
*December 6, 2008*

**chem-help**

I got that A was Cl2 and B was CH2 but i do not understand how to get the grams of C produced, i am confused at this point.
*December 3, 2008*

**chem-help**

no i did identify compounds A and B i just do not understand how to do part a
*December 3, 2008*

**chem-help**

Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15°C...
*December 3, 2008*

**5th grade**

There are 7 girls in a bus. Each girl has 7 backpacks. In each backpack, there are 7 big cats. For every big cat there are 7 little cats. Question: How many legs are there in the bus?
*November 24, 2008*

**Chemistry**

Thanks!
*October 27, 2008*

**Chemistry**

Hi, This is one of my chem hw problems. Does anyone have links to websites that might help me solve this..or equations? It sounds like there are two parts to the question but I'm not sure. Volts and Joules? 1. Electrons are used to determine the structure of crystal ...
*October 27, 2008*

**math help**

Is it supposed to be 5 square root of (x ^7 and y^4)? It should be 5 then you expand everything in the sqroot to be (x x x x x x x y y y y) Then take out for every two of each letter, make it one whole one..... so you get 5 x^3 y^2 squareroot (x) I think that's what it ...
*October 26, 2008*

**algebra 2**

You should just subtract it as that .... -6 sqroot 7
*October 26, 2008*

**History**

Thank you for helping me.
*October 20, 2008*

**History**

How many times has the U.S Constitution been altered over the past 200 years?
*October 20, 2008*

**Chem/Physics**

1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray with an energy of 0.16 MeV). An archaeological sample contained wood that had only 72 percent of the 14C found in living trees. What is its age? I got 500years? 2. The ...
*October 15, 2008*

**Chem/Physics**

Hi! I'm having lots of trouble figuring these two out.....if you could help that would be great- thanks!! 1. The half-life for the (first-order) radioactive decay of 14C is 5730 yr (it emits a β ray with an energy of 0.16 MeV). An archaeological sample contained wood ...
*October 15, 2008*

**Physics: Non uniform motion**

thanks! but what do i do when the time isnt given like in the first question?
*October 2, 2008*

**Physics: Non uniform motion**

I have not done much physics before: I don't get how to do questions that deal with what happened in a particular SECOND So questions like: - A stone which is dropped from rest into a mine shaft falls a distance of 24.5 m DURING THE LAST SECOND. Find depth of the shaft or...
*October 2, 2008*

**Physics**

1) A fish jumps out of the water with a speed of 6.36 m/s. If the fish is in a stream with water speed = to 1.5 m/s, how high can the fish jump if it leaves the water traveling vertically upwards relative to the earth? 2)A ball is thrown by someone on a train moving at 10 m/s ...
*September 9, 2008*

**health**

what is the definition of social and physical health?
*September 3, 2008*

**Algebra**

Solve:25x^4-20x^2+3=0 =(sqrt5/5),-(sqrt5/5),(sqrt15/5),(-sqrt15/5). Can you tell me which one is correct.This is a second post to the first one.
*July 5, 2008*

**Algebra**

Thanks
*July 5, 2008*

**Algebra**

thanks
*July 5, 2008*

**Algebra**

25x^4-20x^2+3=0 = x= i sqrt3/5,-i sqrt3/5. I used the method complete the square. is this is correct
*July 5, 2008*

**help**

thanks
*July 2, 2008*

**help**

Subtract. Simplify by collecting like radical terms if possible. 3sqrt18-3sqrt2 =6sqrt2 I did help.
*July 2, 2008*

**Algebra**

thanks
*July 1, 2008*

**Algebra**

Use the foil method to find the product. (4x^6-7)(x^8-4) this is the answer that I got:4x^14-7x^8-16x^6+28
*July 1, 2008*

**Algebra 1**

PERFORM THE INDICATED OPERATIONS AND SIMPLIFY. x-8/x-9-x+1/x+9+x-27/x^2-81=x^3-81x^2-7x-27/x^2 Can you check this equation for me.
*June 30, 2008*

**dog behavior re post**

please check my answer thanks so much Which of the following best describes when extinction occurs A When a CS is repeatedly prsented and periodically followed ba a US B When a CS is repeatedly presented without the prsention of a US C CS and US are presented together D CS is ...
*June 17, 2008*

**dog behavior**

please check my answer thanks so much for your help. True of False generalization means The tendecy to respond to stimuli resmbling the conditioned stmulus I said True
*June 17, 2008*

**dog behavior**

please check my answer thank you very much for your help The Premack princciple suggets that A. reinforcement is highly frustrating the dog B. A more desirable activity can serve as a reinforcer for aless desirable activity C reinforcement isn't dependent on the dog ...
*June 17, 2008*

**dog behavior**

Please check my answer thank you very much For optimal appetitive classical conditioning which of the following is not important. A The dog should be hungry B THe training enviorment should be relatively distraction free C. THe dog should be give the chane to "use the ...
*June 17, 2008*

**dog behavior**

Please check my answer thank you very much True or False Traning a dog to respond to the word "Good" as a conditioned reinforcer is accomplished by saying "GOOD" just before prsenting food I said True
*June 17, 2008*

**dog behavior**

please check my answer thank you for your help :) True or False Systematic desensitization can be used to reduce fear I said True
*June 10, 2008*

**dog behavior**

please check my answer thanks for your help :) Which of the following is an example of an unconditioned response? A. begging behavior at meal time B barking to get attention C Salivatig when food is taken ito the dog 's mouth D salavating when the dog hears the owner ...
*June 10, 2008*

**dog behavior**

please check my answer thanks for your help :) During extinction, an instrumenatl behavior may initially increase as the result of what ? A failure of the dog to obey the new instruction B. an extinction burst C. temorary defiance D. punishment resistance I said A
*June 10, 2008*

**dog behavior**

please check my naswer for me thanks for your help :) True or False Ivan Pavlov is credited with the systematic study of conditioned reflexive behavior I said True
*June 10, 2008*

**statistics**

. P(at least one head) is the same as 1 - P(no heads). Now, P(no heads) = 1/2 * 1/2 = 1/4 so P(at least one head) = 3/4. P(6) = 1/6. The total is 3/4 * 1/6 = 1/8. actually for part a is it possible the answer could be 1/8?
*June 4, 2008*

**statistics**

Another person had the exact same answers as you. This is for a major grade! Thank You!!
*June 4, 2008*

**statistics**

If you flipped a penny and a nickel, and rolled a die, what is the probability of: a. getting at least one head on the coins and a 6 on the die? b. getting a head on both coins and a 4 on the die ? c. getting a head on both coins and a 3 or a 5 on the die? d. getting a head on...
*June 4, 2008*

**Chemistry**

I dont understand how you get the mols product formed of (c) and why there are moles of a that remain unreacted
*May 31, 2008*

**english**

Are you serious? Come up with your own answers and others will help. This is a simple homework that you could get done in minutes.
*April 28, 2008*

**english**

Thanks Ms. Sue
*April 14, 2008*

**english**

When liquor was banned in 1920, hospitalizations for alcoholism and related diseases plummeted; in 1933, when Prohibition was repealed, alcohol-related illnesses rose sharply again. Legalization of cocaine, heroin, and marijuana would not curb abuse of those substances. a) ...
*April 14, 2008*

**Math**

Can someone tell me this is right? Look for the domain. f(x)=log(sub3)(5x+1) 5x+1<=0 (5x/5)<=(-1/5) x<=(-1/5) x>(-1/5) (-1/5,oo) -domain
*April 9, 2008*

**Algebra**

I am looking for the domain. f(x)=log(sub3)(5x+1) 5x+1<=0 (5x/5)<=(-1/5) x<=(-1/5) x>(-1/5) (-1/5,oo) -domain
*April 9, 2008*

**Algebra**

Can someone tell me how to find a perpendicular line -3x+5y=7 My choices are 7/5 3/5 -5/3 -7/5 I cannot figure this out
*March 22, 2008*

**Geography**

What government imposed barriers stop or hinder the export of automobiles? "export" as in shipping to other countries i think?!
*March 14, 2008*

**Calculus**

ah!!i was so dumb! i was trying to multiplying numerator and denominator by 1+Z,of course it didnt work out...haha... thankyou !!!!
*March 13, 2008*

**Calculus**

two complex numbers Z and W are related by the formula W=(Z+1)/(1-Z) what is W if Z=1.5i? thanks for the help!
*March 13, 2008*

**Calculus--complex numbers**

the complex number Z satisfies Z/(Z+4)= 3+2i Find Z. please help thx!
*March 13, 2008*

**Calculus**

solve (Z^2)+5=-4/Z^2 how do i solve it?? the answer is +2or-2, or, +or -i. but i really dont know how to get this answer.i tried to multiply both side by Z^2, but i think it just made it more comlicated and i didn't get the right answer at the end...can someone please ...
*March 12, 2008*

**Calculus--complex numbers**

thank you so much!!
*March 12, 2008*

**Calculus--complex numbers**

let z= a+bi be a complex number. it is given that the quotient (z-i)/(z-1) is purely imaginary. show that z lies on a circle and determine the centre and radius of this circle. OK, here's my working out...( i am using "X" as my times symbol) step1: (a+bi-i)/(a+bi...
*March 12, 2008*

**math**

finding the product for (7x+1)(x^2+1) and for the problem (2x+6)(x-10) Also finding the product thank you very much
*March 7, 2008*

**psychology**

Mira is a college student who lives alone in an apartment with her cat, Max. Whenever Mira walks into her kitchen and opens the squeaky drawer where Max's food is kept, he begins to salivate and runs into the kitchen, pawing at Mira to be fed. Even when Max has already had...
*March 3, 2008*

**geometry**

prove the following statements using a coordinate proof. the diagonals of a rectangle bisect each other.
*February 2, 2008*

**geometry**

place each given figure in a coordinate plane. what are the coordinates of each vertex? a) a right triangle b) an isosceles triangle
*February 2, 2008*