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September 21, 2014

Posts by Sophie


Total # Posts: 374

Math
What is the distance between the parallel planes 2x+y-3z=13 and 2x+y-3z=35?
May 21, 2011

math
why do you have = signs in part a?
May 12, 2011

math
Given the plane 2x-3y+7z=4, a) Find the equation for the line perpendicular to the plane that intersects the plane at the point P=(6,5,1). b) How far is it from the point (4,-2,3) to the plane?
May 12, 2011

math
Apply logarithms to create a linear relationship: ((x^3)(y^1.5))/(z^.5)=k
May 11, 2011

english homework
Are there language errors? please
April 25, 2011

english homework
nobody?! please help me
April 25, 2011

english homework
Hello, sorry I just saw the last message then I would like help in order to correct the dialogue: spelling, vocabulary, grammar... Be intransigent even if it's my second language tell me if something can seem illogical Look at the dialogue: D: doctor M: patient's ...
April 25, 2011

english homework
thanks
April 25, 2011

english homework
Hello! I have to write a dialogue with 3 characters, the subject is "hello doctor!" I probably make a doctor with a patient and the patient's mother, my idea consists of simulating (a lot of )illnesses in order to not to go to school (it's about the little ...
April 25, 2011

physics
20.7
March 25, 2011

Calc
find the slope of the tangent to the curve: y^2=x^3/xy
February 22, 2011

Calculus
find the derivative of 4x(lnx+ln9)-9x+e
February 21, 2011

Calculus
find the derivative of g(a)=sin(arcsin(9a))
February 20, 2011

physics
a crate is pushed to the top of a frictionless inclined plane 15 m long with a force of 25 N. If the crate weighs 125 N, how high is the inclined plane? 0.5 m 1 m 3 m or 5 m
February 19, 2011

math
what is 8x-2y=-6 please help in simple form
February 8, 2011

maths
i have got to find the perimeter of a triangle that has one side of 8x-7w another that says 3x+9y and then another that says 3y+5w whats the perimeter of the triangle ??? please help
January 21, 2011

science
How many moles of oxygen molecules, O2, are required to produce 0.268 mol of K2Cr2O7? Show your work.
December 29, 2010

Physics
An isolated 3 kg object is moving in the positive y direction along the -y axis at 2 m/s; when it reaches the origin it breaks into two pieces sending a 1 kg fragment in the +y direction at a speed of 3.7 m/s. what are the velocity and direction of the other piece immediately ...
December 16, 2010

Physics
a 60 kg person falls off a 15 kg sled moving at 2 m/s. The person doesn't move after falling. Assuming no friction with the ice, and not other net forces acting on the sled, what is the change in velocity of the sled after the person falls off.
December 16, 2010

10th grade math help
How do you solve? 3-3sinx-2cos^2(x) = 0
December 13, 2010

4th grade algebra
-21... oh the days of fourth grade... have fun!
November 12, 2010

math gr.6
im in 6th grade but i have this book that says scott forson its blue
November 2, 2010

Foreign Languages
ok french and russian
November 2, 2010

Foreign Languages
o ok
November 2, 2010

Foreign Languages
how do you say goodafternoon in evry laungega
November 2, 2010

english 6th grade
what if it says Marco, my older brother, likes to play ________________ tennis. my older brother is underlined would that be nonrestrictive or restrictive
November 2, 2010

english 6th grade
Please help Ms.Sue its a six grade level.
November 2, 2010

english 6th grade
what does restrictive and nonrestrictive mean???????
November 2, 2010

science
what man made object has the greatest acceleration ?
November 2, 2010

spanish 6th grade
tnks
November 1, 2010

spanish 6th grade
how do you say what is your favorite food in spanish
November 1, 2010

science
is it condensationi am not sure
November 1, 2010

science need help!
i am doing questions and i just want to say i need help the question says ____________ affects how much moisture is in the air i dont get it
November 1, 2010

math
the area of a rectangle is 60cm.the length is 11cm more than the width. find the width.
November 1, 2010

psyc
Studies that have overcome methodological problems in examining intelligence scores for African-Americans as compared to people of Anglo- Saxon descent revealed: that the test results were useless because racial prejudice invalidated them. that African-Americans scored higher ...
October 31, 2010

psyc
According to Noam Chomsky, language is primarily acquired through: an innate mental module. our parents correcting us. imitating our parents. trial and error. I chose B. Is this right?
October 31, 2010

psychology
Now I am a little confused...was my first option right?
October 31, 2010

2nd grade,science
run dance play talk so much more!!!
October 31, 2010

6th grade
ok thank you so much! :)
October 29, 2010

6th grade
but what if the problem is 16 2/7 - 10
October 29, 2010

6th grade
sooo will it be the same if you had 16 2/7 -10 ______________ you would have to change 10 into 9 and and put 7/7 so it would be like this 16 2/7 -10 7/7 but you would have take something to make it a problem
October 29, 2010

6th grade
how do you solve a problem when you have one whole # with a whole # and fraction. this is subtracting ex: 16 -10 2/7 ________________
October 29, 2010

english
why is Theodor a hero and why is he so important
October 18, 2010

Calculus
Find the derivative by the limit process. 6/√(8x)
October 15, 2010

Calulus
Consider the following function. f(t) = 3t2 − 3 (a) Find the average rate of change of the function below over the interval [3, 3.1]. (b) Compare this average rate of change with the instantaneous rates of change at the endpoints of the interval. (at t = 3) (at t = 3.1)
October 15, 2010

calculus
The tangent line to the graph of y = h(x) at the point (-6, 9) passes through the point (6, 2). Find the following values. (a) h(-6) (b)h '(-6)
October 15, 2010

Physics
an canoe is 5.67 in m how long in cent?
October 14, 2010

5th grade
l=32 l=2 (e) l=5 (e) l=(2xe)+(5xe)=L e=4 m=8 o=20
September 30, 2010

calculus
Determine the equation of a curve in the xy-plane that passes through the point (0, 1) and has the slope x2 sin 4x at any point (x, y) on the curve.
September 29, 2010

math
3x³=90
September 16, 2010

math
-3.1
September 16, 2010

writing
I have to write a thesis statement on a belief i have that have changed and why
July 20, 2010

General Chemistry
What happens to the rate of evaporation of a liquid after… a. a decrease in temperature b. an increase in the surface area of a liquid exposed to air c. an increase in the intermolecular forces
July 14, 2010

math
This is a place for homework help, not for chatting and randomness.
June 1, 2010

science
The greatest velocity a falling object reaches is called its what?
May 6, 2010

chemistry
how many grams of copper hydroxide can b prepared from 2.7g of copper (II) nitrate and excess sodium hydroxide?
March 23, 2010

chemistry
how many grams of copper hydroxide can b prepared from 2.7g of copper (II) nitrate and excess sodium hydroxide?
March 23, 2010

Math
set S is composed of the square of every element of the set {-5,5}. what is S?
March 21, 2010

Chemistry
im not quite sure what to do with this problem... the info I have: -balanced equation= (CuCl2*2H20)=>CuCl2+2H2O -initial mass of copper compound: 0.94g Q: use stiochiometry to find the theoretical yield for the mass of copper (II) chloride we also used 30mL of water in our ...
February 28, 2010

3rd grade
How many day in a leep year?
February 26, 2010

2nd grade
no, mainly igneous rocks come from lava.
February 22, 2010

art
i am researching a piece of art work by frida kahlo and i need more infomation about he work, any sujestions?
February 4, 2010

calculus
Which has more area, the region in the first quadrant enclosed by the line x+y=1 and the circle x^2+y^2=1, or the region in the first quadrant enclosed by the line x+y=1 and the curve sqrt(x)+sqrt(y)=1? Justify your answer.
January 21, 2010

Algebra
what is "5x + 7 = 22" simplified? x
January 12, 2010

social studies ww1
what was united states policy toward the war when it broke out PLEASE HELLLLP
December 1, 2009

social studies
world war one
December 1, 2009

social studies
why did the nations of Europe go to war
December 1, 2009

science
a teacher does 140 J of work in 20 s. How much power did he use?
November 16, 2009

science
in the course of a short race,a car does 50,000 J of work in 7 s. What is the power of the car during a race?
November 16, 2009

science
a libraian lifts a box of books that weighs 93 N a distance of 1.5 m. How much work does he do?
November 16, 2009

science
as you push a lawnmower the horizontal force is 300 N. If you push the mower a distance of 500 m, how much work do you do?
November 16, 2009

science
dr.bob222 i dont get it can u give me the answer
November 15, 2009

science
how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j
November 15, 2009

science
how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j
November 15, 2009

science
suppose you are pulling a wagon with the handle at an angle. How can you make your task easier?
November 15, 2009

math
2
November 15, 2009

social studies
why did the us want to build a canal across panama 2 how did the us gain control of the panama canal zone 3 how did the people of panama feel about us control of the canal zone why 4 what agreement did the us make with panama in 1977 5 what are the countries of central America
November 9, 2009

english
were public places segregated in 1948
November 9, 2009

science
what is orbital motion and lubricant
November 8, 2009

science8 intergeted
what is lubricant and orbital motion
November 8, 2009

chemistry, science
Carbon is also removed from the atmosphere during the process of weathering. carbon dioxide combines with water to form carbonic acid. this reacts with calcium silicate (in rocks) to produce calcium ions, bicarbonate ions and silicon dioxide (silica) the chemical equation for ...
November 2, 2009

General Chemistry
Question 1: In the Balmer-Rydberg equation, what value of m is used to determine the wavelengths of the Balmer series? m=? Question 2: List a possible set of four quantum numbers (n,l,ml,ms) in order, for the highest energy electron in gallium,Ga.
October 25, 2009

science
what factors affect the friction forces between two surfeces 2a what is the law of universal gravitation
October 20, 2009

science
1a-b)what are the four types of friction what factors affect the friction force between two surfaces
October 20, 2009

Math Data Management
In how many ways can the 12 members of a volleyball team line up, if the captain and assistsant captain must remain together? Thank you in advance.
September 21, 2009

French
Some interesting facts about the euro tunnel, the eurostar and the shuttle?
September 16, 2009

english
thank u
September 15, 2009

english
Ihave just read me it is a disaster,sorry for the errors
September 15, 2009

english
Dear americans,I would like to retranscribe me the speech of obama in high school in Norfolk (video is on youtube) please make it for a French desperate person (it is my first year at high school) what methods shall I be able to use to understand English better?
September 15, 2009

tech
in tech we are reasearching inventors chefs and designers i chose to research, Gordan Ramsey i have all ready found out most of my info which i need to collect but i am having trouble with, .who is his inspieation. and .why did he become a chef.
September 4, 2009

Trig problems
Part 1) Evaluate tan 7.5 Part 2) Evaluate exactly cos (-(45pi(4)))
August 14, 2009

French 2 help!
okay, thanks, it was right
August 13, 2009

French 2 help!
Jen e veux pas savoir ____ est arrive. a. ce qui b. ce que Je crois _____, je vois, C'est tout. a. ce qui b. ce que I think 1 is a and 2 is b... am I right?
August 13, 2009

Math
In a random sample of 30 tires of the same type, it is found that the average life span is 36,200 miles with a standard deviation of 3800 miles. Find the interval about the sample mean such that the probability is 0.77 that the mean number lies within the interval. a. 35,402-...
July 3, 2009

Math-stats
thanks
July 2, 2009

Math-stats
The playing times of 20 songs on a top-hits radio station are recorded in the chart below. Playing Time (minutes:seconds) 3:32 3:24 2:54 3:07 4:52 3:45 2:39 3:09 3:34 3:26 3:35 4:17 4:03 3:52 5:10 4:59 3:07 4:00 3:07 2:56 In a histogram of this data, which bar would have the ...
July 2, 2009

Math
Use the first five terms of the trigonometric series to find the value of sin pi/12 to four decimal places. a. 0.2618 b. 0.2588 c. 0.7071 d. 0.2648 I got B, is this right?
June 27, 2009

math
I get confused with negatives sometimes! thanks though!!
June 24, 2009

math
Simplify: (-1-2i)+(4-6i) I get 3-8i and 5-8i... confused, which one is it?
June 24, 2009

sience
does anyone know if, orange juice is a pH indicator??
June 22, 2009

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