Sunday

December 11, 2016
Total # Posts: 1,627

**math**

c+5=18 ----- -3 c=?

*April 7, 2009*

**Math**

k thanks

*April 6, 2009*

**Math**

see we done that and i get it but im still a bit confused try giving me a problem and i will figure it out.

*April 6, 2009*

**Math**

Could someone please explain to me how you get answers when you add a negative number to a negative number or a positive number to a positive number or a negative and positive number added together, because my teacher tried explaining it to me, but I'm completly lost. The ...

*April 6, 2009*

**Math**

thanks for your help.

*April 5, 2009*

**Math**

When you add a positive integer and a negative integer, you sometimes get a negative result and sometimes get a positive result. Is the same true when you multiply a positive integer and a negative integer?

*April 5, 2009*

**Geography**

Ok thanks.

*March 24, 2009*

**Geography**

well i thought latin america was only made up of one continent, plus my wordsearch only has three latters and the first letter begins with an O.

*March 24, 2009*

**Geography**

Its ok..haha...is there only one?

*March 24, 2009*

**Geography**

How many continents are in Latin America?

*March 24, 2009*

**Geography**

Country north of Central America. If you can help me out with this, it will be well appritiated thanks.

*March 24, 2009*

**Geography**

Thanks.

*March 24, 2009*

**Geography**

Well I'm doing a crossword puzzle for my class, and it has 6 letters and the first letter begins with a R and the fourth letter is an I...if that helps any.

*March 24, 2009*

**Geography**

Do you know what's Brazilian coastal city? If you can help me out with this, it will be well appritiated thanks.

*March 24, 2009*

**Geography**

Thank you very much I knew that was it haha.

*March 24, 2009*

**Geography**

is it peninsula?

*March 24, 2009*

**Geography**

Well, I'm doing a crossword puzzle for school and it has 9 letters, and the 5th latter is an N, if that helps any..

*March 24, 2009*

**Geography**

Type of landform between the Gulf of California and Pacific Ocean. If you can help me out with this, it will be well appritiated thanks.

*March 24, 2009*

**Chemistry**

I got 89.1 mmHg.

*March 16, 2009*

**Language Arts**

_________ __________ help you "see" or "envision a play" (drama) you read. If you could help me out with this answer it will be well apriciated, thanks.

*March 16, 2009*

**college math**

one number is 8 more than twice another. their product is 8 more than twice their sum. find the numbers

*March 14, 2009*

**Reading**

What stinks when alive but smells good when dead?

*March 13, 2009*

**Chemistry**

How would you calculate delta H for the following reaction: 2P + 5Cl2 -> 2PCl5 Given: PCl3 + Cl2 -> PCl5 Delta H=-87.9 kJ 2P + 3Cl2 -> 2PCl3 Delta H=-574 kJ I have no clue how to do this since I was absent. Can someone help?

*March 3, 2009*

**math**

convert these decimals into common fractions 0,33

*March 1, 2009*

**maths**

help me simplify this 3/4*1/5*3/10 and 6 2/3 / 10/21

*February 28, 2009*

**maths**

how do i convert this decimal 5,2 into a common fraction

*February 26, 2009*

**maths**

how do i convert decimal fraction into common fraction

*February 26, 2009*

**5th grade science**

How much faster does sound travel through water than through air in one second?

*February 24, 2009*

**Philosophy 130**

What ought you to do for a pregnant woman who asks your help in getting to the hospital, according to your understanding of the main ethical theories, i.e. egoism, universal consequentialism(utilitariansim), and Kantian deontological theory? Suggested length: 2-4 paragraphs.

*February 24, 2009*

**Chem**

Some very effective rocket fuels are composed of lightweight liquids. The fuel composed of dimethylhydrazine (CH3)2N2H2 mixed with dinitrogen tetroxide was used to power the Lunar Lander in its missions to the moon. The two components react according to the following equation...

*February 24, 2009*

**General ?**

What does non-profit faith based facility mean?

*February 21, 2009*

**algebra**

5.A) Kwame sells ice cream cones at the country fair. He has to rent the equipment for $29 and spend $0.43 on ingredients for each cone. How many ice cream cones must he sell at $1.10 each in order to make a profit? A)Wrie an inequality that represents how many ice cream cones...

*February 16, 2009*

**French**

Can someone check my letter? We had to write it even though not all students got their letters for some reason, so it is kind of short. Also, can someone tell me some ways to add the future tense and the subjunctive a little more? I want to show what I have learned since the ...

*February 2, 2009*

**chemistry please**

if i want to find the molarity of a solution that is: 5mL of a 3.521 x 10^-5 M solution, and filled to the 50mL line with ethanol, would this be: (3.521 x 10^-5)(.04L ethanol)?

*February 1, 2009*

**French**

How would you say 'hidden talents' in French? Would it be something like "Est-ce que tu as des talents caches?" (With the accent, I'm on a laptop and it won't let me type it"

*January 30, 2009*

**Chemistry**

Vinegar is 5% acetic acid. If the density of household vinegar is approximately 1.00 g/mL, how many grams of acetic acid are contained in 10.0 mL of vinegar? So I started out with 10.0 mL of HC2H3O2 then multiplied by 1.00g/1mL. What do I do next? Is it done there?

*January 28, 2009*

**physics**

Which is denser, ice at 0 degrees C or water at 4 degrees C? i know water is densest at 4 degrees C, but im not sure if ice is denser.

*January 11, 2009*

**Science**

During photosynthesis, plants produce something that humans need for survival. What is it?

*January 8, 2009*

**Science**

I am a large mass of frozen water. I can move rocks and boulders. I move very slowly, but i cause great changes on Earth. What am I?

*January 8, 2009*

**Chemistry/Physics**

yes but T is affected volume and pressure changes according to the ideal gas law

*January 7, 2009*

**Chemistry/Physics**

A Sample of gas is held at constant pressure in a cylinder moved by a closed piston. If the volume is halved, how will the new Vrms speed compare with the old one? a) square root of 2 times greater b) the same c) 2 times greater d) 4 times greater e) none i think its e because...

*January 7, 2009*

**social studies**

thank you

*January 7, 2009*

**social studies**

which of the following statements best describes kennedy's point of view? a.the only way that people can influence their government is by writing letters to their elected officials. b.you are not a citizen unless you vote. c.voting effects everyones future. d.government ...

*January 7, 2009*

**algebra**

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mph and train B is traveling at 110 mph. Train A passes a station at 3:10 pm. If train B passes the same station at 3:40pm, at what time will train B catch train A? 4:30 pm I am ...

*January 7, 2009*

**algebra**

Thank you sooo much!

*January 7, 2009*

**algebra**

Amy paid $62.18 for shoes during a 15% off sale. What was the regular price? $71.51 is this correct?

*January 7, 2009*

**algebra**

On 3 consecutive passes, a football team gains 5 yards, loses 28 yards, and gains 41 yards. What number represents the total net yardage? 5-28+41 18

*January 7, 2009*

**Algebra**

I am having problems figuring out some of my word problems for this week. Could someone check these? The equation y=-1777x+27,153 can be used to predict the number of gun deaths in the U. S. x years after 2000, that is, x=0 corresponds to 2000, x=2, corresponds with 2002, x=5...

*January 7, 2009*

**math**

yes so the answer would be 61 correct?

*January 7, 2009*

**science-physics**

All objects emit ______ radiation. Is it incident? The frequency of the radiation of most objects is a) below b) in the middle of c) greater than he frequency of the visibile light spectrum? I think its below as most objects can not be seen by visible light.

*January 4, 2009*

**spanish**

how do u say estoy in the yo form in the past

*December 16, 2008*

**6th grade**

I need help unscrambling these letters to form two words: inenidj tcain They go along with the phrase ______ _____and Persia.

*December 15, 2008*

**math**

A box contains 4 coins: a penny, a nickel, a dime, and a quarter. It costs a dime to reach in and take a coin. What is the expected value of this game?

*December 12, 2008*

**spelling**

grass:lawn::toss:? does anyone know the answer

*December 9, 2008*

**Science**

oh water thanks

*December 2, 2008*

**Science**

I can be three different states of matter, but not at the same time. I am necessary for life, but i can also destroy life. I can be under your feet, around your body, or over your head. What am I?

*December 2, 2008*

**French**

I had the duck story too :) We do these weekly but I like to get them checked when I do them in a hurry because I make twice as many mistakes! Merci Mme

*December 2, 2008*

**French**

Can someone check my paragraph please? Merci! It's about Thanksgiving :) Mes vacances sont passées assez ennuyeuses, alors j'ai inventé des nouvelles vacances! Le mercredi dernier, j'étais rentrée à la maison quand mes parents ont...

*December 2, 2008*

**Physics**

A uniform, spherical bowling ball of mass m and radius R is projected horizontally along the ﬂoor at an initial velocity v0 = 6.00 m/s. The ball is not rotating initially, so ω0 = 0. It picks up rotation due to (kinetic) friction as it initially slips along the &#...

*November 19, 2008*

**Math Check**

Yes thanks so much!

*November 19, 2008*

**Math Check**

is the 2nd equation 2x + 2y = 112 I don't get 4... I'm sure the 1st equation is x+y = 110 but I can't figure out the 2nd.

*November 19, 2008*

**Math Check**

Are the equations for these questions right? 1) Erik has 2 part-time summer jobs. For Job 1 he gets $9/hr on weekdays and for Job 2 he gets $12/hr for weekends. Last week he worked 23 hours and he earned a total of $231. How many hours did he work on the weekend? 9x+12y = 231 ...

*November 19, 2008*

**Math**

Kris is starting a delivery business in Ottawa called Kris' Speedy Express. He charges $5, plus $1.50/kg to deliver a package throughout all of Ottawa including all outside communities. His competition, John's Same Day Deliveries charges $6 per delivery plus $1.00/kg. ...

*November 19, 2008*

**Australian History**

Can someone please tell me the punishments onboard the first fleet to Australia?

*November 19, 2008*

**Physics please help**

Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?

*November 17, 2008*

**Physics**

Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?

*November 17, 2008*

**Physics**

Given a simple pendulum of length r and mass m, determine the oscillation period T if the perturbation angle θ is very small (i.e. θ < 10degrees). How can I derive an equation for period using just that info?

*November 17, 2008*

**Physics**

Are you getting 5.28 J for the total energy?

*November 14, 2008*

**Physics**

Also for position I'm getting 0.145 when I use this equation => x = -.013 sin 34.6 t + .0640 cos 34.6 t

*November 14, 2008*

**Physics**

I don't get it. I'm getting x = 0. Is that supposed to be right?

*November 14, 2008*

**Physics**

A 215 g mass attached to a horizontal spring oscillates at a frequency of 5.50 Hz. At t=0s, the mass is at x= 6.40 cm and has vx =- 45.0 cm/s. Determine: a) The Maximum acceleration to 3 significant digits. - I calculated this to be 7.64 but it keeps saying I have the wrong SD...

*November 14, 2008*

**Physics**

The two blocks in the figureoscillate on a frictionless surface with a period of 1.5s. The upper block just begins to slip when the amplitude is increased to 38cm. What is the coefficient of static friction between the two blocks?

*November 13, 2008*

**Physics**

Suppose that one oscillation of a swinging lamp takes 5.5s. What maximum speed does the lamp have if its maximum angle from vertical is 3.0degrees? I first found L to be 7.51m. That was right. Now, I calculated the angular frequency of the pendulum to be 1.14. I'm pretty ...

*November 13, 2008*

**science**

what are some key characteristics of fungi?

*November 11, 2008*

**math**

350*(6/100) = 21 350+21 = $371

*November 11, 2008*

**physics**

Use 1 of your kinematic equations twice. vfinal^2 = vinitial^2 + 2ad. First you want to find the speed of the drag racer right when the parachute opens. vfinal^2 = vinitial^2 + 2ad. Substitute 0 for vinitial^2 and take the square root of 2(17)(402). That becomes your initial ...

*November 11, 2008*

**Physics**

There is no kinetic energy unless the object is oscillating.

*November 11, 2008*

**Pre-Algebra**

what?

*November 9, 2008*

**Pre-Algebra**

In a-c, explain what would happen to a figure if you transformed it using the given rule. a. (3x, 6y) b. (x+2, y+1) c. (2x, 2y +5)

*November 9, 2008*

**Pre-Algebra**

A rectange has dimensions of 1 and 6. Another rectangle was drawn from it using a scale factor of 1.5. A. The area of the large rectangle is how many times the area of the small rectangle? B. The perimter of the large rectangle is how many times the perimeter of the small ...

*November 9, 2008*

**Physics Really Need Help Please**

I found 583 for the first one which is right. I have no idea how to do the 2nd and 3d question please help!

*November 7, 2008*

**Physics Really Need Help Please**

At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...

*November 7, 2008*

**Physics**

I don't understand the question. What's the displacement for either of those parts? What equation should I use?

*November 7, 2008*

**Physics**

At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...

*November 7, 2008*

**MATH**

well i think that is called the y-intercept form

*November 6, 2008*

**MATH**

How do you write an equation in standard form? Ex.How would you write this in standard form? y+1=x+2

*November 6, 2008*

**5th Grade student teacher: Needs ur help....**

What fun activity could I use to to teach 5th grade students about the Constitution?

*November 6, 2008*

**9th**

6a+4 = -8 6a = -8-4 a = -12/6 a = -2

*November 5, 2008*

**4th grade math**

The sum of two numbers times a third number is equal to the sum of each added number times the third number. For example 4 * (6 + 3) = 4*6 + 4*3.

*November 5, 2008*

**Calculus**

Use the quotient law where you find the derivative of f(x)*g(x)-the derivative of g(x)*f(x) and the whole thing divided by g(x). (x+2)(x^3+x-2)' - (x+2)'(x^3+x-2) ---------------------------------- (x^3+x-2)^2 (x+2)(3x^2+1) - 1(x^3+x-2...

*November 5, 2008*

**Damon**

Thank you so much for all the calculus help! I felt more prepared for the exam!

*November 5, 2008*

**Calc again sorry**

4) The graph of y = (x)/(1+25x^2) for x is greater than or equal to 0 has a horizontal tangent at x = what. So what I did was find the first derivative. I did the quotient rule and ended up with x50x - 1+25x^2 --------------- (1+25x^2)^2 I equated that with 0 but I don't ...

*November 5, 2008*

**Calculus**

lim(x->infinity) sqrtx sin(1/sqrtx) Someone please start me off. I don't know how to find the limits of trigonometric functions.

*November 5, 2008*

**Calculus**

How do you do this question. f(x) = (5x-1)/(2-3x), find f^(-1)(x). The answer is supposed to be (1+2x)/(5+3x). -------------------------------------- And can you please explain this one to me. Suppose that xy^(3)+2y^(2)+xy+2x^(3) = 0. Find the general expression for dy/dx. ...

*November 5, 2008*

**Calculus**

Don't you have to do implicit differentiation?

*November 5, 2008*

**Calculus - Damon**

Thanks so much!

*November 5, 2008*

**Calculus - Damon**

Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I found the derivative which is 3x^2. Let (a, a3) be the point of tangency. 3x^2 = (a3 - 1/4)/(a-0) I'm not sure how to solve for a. Yes, the point is (0,1/4) but it&#...

*November 5, 2008*

**Calculus part 3 so sorry**

y = e^2xsin3x Find the derivative. So I used the product rule and I got sin3x(e^2x)+cos^3x(e^2x). But the actual answer is sin3x(2e^2x)+cos^3x(3e^2x) Where the the 2 and 3 before the e come from?

*November 4, 2008*

**Calculus Part 2**

y = tan(sqrtx) Find dy/dx. So I found it and I got the answer as sec^2(sqrtx) but the answer is (sec^2(sqrtx))/2(sqrtx)...why? ---------------------------------- 2) Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I ...

*November 4, 2008*

**Calculus questions..really need help, please!**

1) Find the value of the lim(x->0) ((sin5x/sin2x)-(sin3x-4x)). I have no idea where to start so if someone could start it off for me it would really help. 2) If f(x) = (2x-3)/(5x+4) then what's the inverse of f(x) So I replaced x with y x = (2y-3)/(5y-3) Now am I ...

*November 4, 2008*