Wednesday

July 27, 2016
Total # Posts: 3,464

**Math**

Cheers Steve.
*June 10, 2015*

**Math**

If f and g are functions defined for all real numbers, and f is an odd function, then f ∘ g is also an odd function. Justify. I wrote false cause for example if f = x^3(odd) and g=x^2(even) the fog is even.
*June 10, 2015*

**Physics**

A race car travels on a flat circular track at the maximum possible speed without slipping. If the radius of the track is 39m and the coefficient of friction is 0.73, how long (seconds) does it take the race car to complete 5 laps?
*June 9, 2015*

**math**

balance on an initial investment of $1,500 over 25 years at 5% APR. After 10 years about how much interest has the investment earned
*June 6, 2015*

**6th Grade World History Help Please!**

the answer is B
*June 5, 2015*

**Calculus**

Describe the solid whose volume is represented by the following definite integrals. The integral of 2pi(x-1)e^x from 2 to 7.
*June 5, 2015*

**Social Studies**

opps wrong disscution
*June 4, 2015*

**Social Studies**

ok ok ok ok i did read
*June 4, 2015*

**language arts**

not going to help anymore bad at helping people at least i tried
*June 4, 2015*

**language arts**

iris is my sister
*June 4, 2015*

**language arts**

now i am getting really confused
*June 4, 2015*

**language arts**

no this is alex
*June 4, 2015*

**language arts**

i agree it is awesome but the ending i was just made
*June 4, 2015*

**language arts**

opps wrong name
*June 4, 2015*

**language arts**

do you still want to learn more about it
*June 4, 2015*

**language arts**

never mind i still have the book
*June 4, 2015*

**language arts**

i consider it as horrible ending becasue there is no series and i do not have the book anymore although i wish i did
*June 4, 2015*

**language arts**

well in the book it says that well i think it had said that it is inportant so he does run away but with the younger brother then at the end it has a horrible endng
*June 4, 2015*

**Social Studies**

United States that American settlers were destined
*June 4, 2015*

**French, foreign languages**

Salut, I am taking French 20 through ALDC via VHLCentral and I am having trouble with 5 questions of Lesson 2B-Enregistrez. I have the answer for question 1. But for the other 5 I do not have a clue can someone please help me with this? If someone has done this course in the ...
*June 3, 2015*

**Math: 5th Grade**

A florist had an equal number of red and yellow tulips. She sold 624 red tulips. Then she had 4 times as many yellow tulips as red tulips. How many tulips did she start with? You must use a bar model to solve this problem.
*June 1, 2015*

**Math**

prove: sec^2(x)=1+tan^2(x)
*June 1, 2015*

**Math**

'Write as a piecewise defined function.'
*June 1, 2015*

**Math**

Can someone please help me with piecewise functions. I know what they are but when it gets to advanced i have ttrouble. s(x)= /x-2/ + /x-3/ + /x+1/ (/ / = 'modulus') Write as a piecewise defined function. Have no idea tbh. Thanks
*June 1, 2015*

**art**

setting up a photograph to control the lighting, the subjects position, and the angle of the photograph is an example of which artistic technique A.) improvisation B.) staging C.) photo editing d.) cropping
*May 29, 2015*

**Physics**

On a flat golf course, a golf ball lies 12m from the base of a lamp post. A golfer hits the ball with a club, giving the golf ball an initial velocity of 18 m/s. At 2.9 seconds, after being hit, the golf ball strikes the top of the lamp post. How high (m) is the lamp post?
*May 26, 2015*

**chemistry**

how many grams of solid magnesium nitrate should be added to 5.0 grams of solid sodium nitrate in a 500 mL volumetric flask in order to produce an aqueous 0.25M solution of NO3- ions (once the flask is filled to the 500mL volume line)? No idea where to start for this question.
*May 25, 2015*

**Foreign language, French**

I also need help understanding what the speaker for Lesson 4A Decrivez is saying because she kind of mumbles and I can't catch it. If someone is currently doing the course ( the course is French 2) that will be ideal but any and all help I will find acceptable. Thanks (Merci)
*May 25, 2015*

**Foreign language, French**

I need help with speaking portion of the VHL Central Lesson 2B Enregitrez as I can't really hear the speaker quite properly. If someone is currently doing the course ( the course is French 2) that will be ideal but any and all help I will find acceptable. Thanks (Merci)
*May 25, 2015*

**Math**

It did help but not sure if they are two different experiments cause your are comparing the effectiveness of each weed killer. Also not really sure on how to draw the flow chart for the design.
*May 23, 2015*

**Math**

And what if i'm having problems cause i did not attend class for these? Anyways From what i can figure out: a) The explanatory variables would be the actual weed killers (A and B) and the different type of weeds themselves... so two explanatory variables ?.. weird? ...
*May 23, 2015*

**Statistics**

So can you confirm if this is good enough? (4marks) Sample size is a very important factor in terms of the test of significance. Increasing the sample size increases the power of a significance test. Here the 'power' of a significance test measures its ability to ...
*May 23, 2015*

**Statistics**

The interpretation of a test of significance can depend on the sample size and the practical context of the test. Write a short explanation of how sample size can affect the decision about statistical significance and whether or not the result is of any practical significance.
*May 23, 2015*

**Physics**

An object is placed 20.0 cm to the left of a convex lens with a focal length of +8.0 cm. Where is the image of the object? A)28 cm to the right of the lens B)13 cm to the left of the lens C)13 cm to the right of the lens
*May 21, 2015*

**help**

The sum of two numbers is 20. One number is 3 times the other. Find the numbers.
*May 20, 2015*

**math**

The Bishop's Peak 4-H club is having its annual fundraising dinner. Adults pay $35 apiece and children pay $20 apiece. If the number of adult tickets sold is twice the number of children's tickets sold, and the total income for the dinner is $1,890, how many of each ...
*May 20, 2015*

**math**

2 N 11D ?
*May 20, 2015*

**math**

Diane has $1.20 in dimes and nickels. She has a total of 13 coins. How many of each kind does she have?
*May 20, 2015*

**mathematicalmodel**

This is very true, I haven't got the answer, but the exam finishes today. I am not interested in using it to pass, but I would like to see the working (if possible, when the exam is finished!)
*May 19, 2015*

**mathematicalmodel**

I can not figure this out! has anyone got it?
*May 19, 2015*

**physics**

Work=change in potential energy therefore W=mgh = 75kg*9.8m/s^2*1.75m = 1286.25 J
*May 19, 2015*

**Calculus**

The following definite integral gives the area of the region between the graph of the function f(x) = Icosx - x^2I (I=modulus), the x-asis, and the lines x=-2 and x=2. the integral of mod cosx - x^2 from -2 to 2. Describe a different region whose area is given by this integral...
*May 19, 2015*

**Calculas**

and this got me to Galagan's answer of 4*pi... but still not sure so don't take my answer for it Galagan.
*May 19, 2015*

**Calculas**

hhmmmm... i used the equation v=integral of pi*y^2 from a to b.
*May 19, 2015*

**Math**

Simplify -5x-5y+3+x+2y-3.
*May 14, 2015*

**Computer science**

Write the pseudocode for a method that receives as input the cost of a meal, and then adds a 9% tax rate, and then outputs a 15% tip on top of the price+tax
*May 13, 2015*

**Science **

When a water wave with a positive amplitude of one meter meets another water wave with a negative amplitude of one meter, what will be the result? Explain.
*May 11, 2015*

**Science**

What is the formula for the frequency of visible light? Using this formula, explain what will happen to the frequency when yellow light (580 nanometers) is slowed down slightly when it passes through a crystal.
*May 11, 2015*

**life orientation**

Alien & Sedition Acts.
*May 11, 2015*

**Chemistry**

A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when [Mn2+] is 2.1 M and Ecell = 0.13 V.
*May 4, 2015*

**history**

What geographical advantage does the Italian landscape have over the Greek landscape?
*April 29, 2015*

**history**

How long did the Byzantine Empire last?
*April 29, 2015*

**science**

How much heat is added to 10 g of water when you start from room temperature and heat it to its boiling point?
*April 27, 2015*

**Social Studies Please Help!!!**

That makes a lot more sense....
*April 27, 2015*

**Social Studies Please Help!!!**

My reasoning behind changing my name was to see if alphabetic order mattered, but it doesn't..... just wanted to let you know....(=
*April 27, 2015*

**Social Studies Please Help!!!**

(=
*April 27, 2015*

**Social Studies Please Help!!!**

1) Which of the following most directly made possible the Age of Exploration? A) hydropower B) caravel C) aqueduct D) wind turbine 2) Which region of Western Europe experiences an arctic climate. A) the Iberian Peninsula B) Italy and Greece C) the British Isles D) Northern ...
*April 27, 2015*

**Chemistry **

One mole of N2 and 3 moles of H2 are placed in a flask at 375 degree celsius.? Calculate the total pressure of the system at equilibrium if the mole fraction of NH3 is found to be 0.21. The Kp for the reaction is 4.21 x 10 raise to -4
*April 22, 2015*

**Science**

The effect _______ explains how fast air moves across a surface, the ____ pressure that presses on that surface. In contrast, the more ____ that air moves, the more of _____ there will be. I'm sorry that it might not make sense, I translated it from French. I tried using ...
*April 21, 2015*

**Math**

Hi again. Just realised that i got B wrong. So it means i need that too. Just to clarify (b) Show that if x and y are related by the equation √x + √y = 1 then dy _____ dx= -√(y/x) _ _ I got -√y/-√x.
*April 21, 2015*

**Math**

In this problem we consider drawing some straight lines which form a nice pattern. Consider joining the point (0.1,0) to the point (0,0.9) by a line segment; then joining (0.2,0) to (0,0.8) by a line segment; and so on. In general, consider joining the points (a,0) and (0,b) ...
*April 21, 2015*

**history**

Gaul is the Roman term for what modern country?
*April 20, 2015*

**Math**

7. You are having a discussion about sequences with your classmate. She insists that the sequence 2, 3, 5, 8, 12 must be either arithmetic or geometric. Is she correct or incorrect? Explain.
*April 17, 2015*

**AP Chemistry**

The thing is I tried the negative p delta v on my UT homework, and it didn't accept so I thought maybe moles had something to do with it. Unless I was doing the equation wrong.
*April 16, 2015*

**AP Chemistry**

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 5.1 liters against a constant external pressure of 0.0100 atm? Answer in units of J. I get w=-p(deltaV) but what about moles?
*April 16, 2015*

**6th grade math**

Chris has made the following grades on five math test. 90,74,86,75,94 What score must Chris earn on the next math test to have a test average of exactly 85?
*April 14, 2015*

**6th grade math**

While battling a forest fire , Samuel was only able to get three hours of sleep during the first day. What was the percent of the day was Sam awake F. 87.5% G. 37.5% H. 90% J. 10%
*April 14, 2015*

**5th grade math**

As of july 2004, the population Was 293,027,571 if more than half of these peaple live within 80 kilometers of an ocean,about how many peaple live within that distance show your work
*April 13, 2015*

**Algebra 1**

My answer is 27 sqrt 15y^2
*April 13, 2015*

**Physics**

A spring of length 10.0 cm and spring constant 160 kN/m is compressed to a length of 4.00 cm. If, when released, it pushes a block of mass 100 kg, a) what is the speed of the block after it slides up a 15.0 cm hill? b) What is its speed after it falls into a 10.0 cm dip?
*April 9, 2015*

**ttu**

The triprotic acid H3A has ionization constants of Ka1 = 2.5× 10–4, Ka2 = 3.4× 10–8, and Ka3 = 5.4× 10–13. Calculate the following values for a 0.0760 M solution of NaH2A
*April 9, 2015*

**chemistry**

how many electrons can n=4 l=1 have?
*April 8, 2015*

**Spanish**

in that case if you are referring to a specific cafeteria like the school's cafeteria it would be "la comida de la cafeteria no es saludable" if not then "la comida de cafeteria no es saludable"
*April 7, 2015*

**Spanish**

Are you going to write it with in a sentence or by itself?
*April 7, 2015*

**ela help me on this please damon,reed,writeacher**

"inappropriate" lol'd
*April 1, 2015*

**Trigonometry**

Solve each equation, giving a general formula for all of the solutions: a. 2sin^2(x)-5 sin(x)-3=0 b. (cos(x)-((sqrt2)/2))(sec(x)-1)=0
*March 28, 2015*

**Trigonometry**

Solve each equation for theta, giving a general formula for all of the solutions: a. tan(theta)=-1 b. sin(theta/2)=1/2
*March 28, 2015*

**English**

i dont know
*March 25, 2015*

**English**

During our summer vacations, we would always go out to our cabin by Butterfly Creek. The trips were always fun and relaxing. We would take hikes, photograph the wildlife, and swim in the river. Wildflowers in high meadows. Butterflies hovering. I still remember the smell of ...
*March 25, 2015*

**science**

based on the masses of CaCl2 and Na3PO4 you determined from the periodic table, what mass combining ratio would you predict?
*March 22, 2015*

**Chemistry**

If there are 57.6 mL of water that change from 19.4 degrees Celsius to 34.7 degrees Celsius, calculate the number of joules of energy transferred in the form of heat. Round to the nearest whole number. The specific heat capacity of water is 4.18 J/g*C and density of water is 1...
*March 22, 2015*

**Economics**

1. What determines the size of the key-money payments that landlords demand (and tenants offer) for the right to rent a controlled apartment? 2. Who, other than the owners of rental units, loses as a result of rent controls? Who gains from rent controls? What effect would the ...
*March 20, 2015*

**business math**

Stereo Inc. sells a stereo system for $500 down and monthly payments of $60 for the next 4 years. If the interest rate is 1.75% per month, find: a) The cost of the stereo. b) The total amount of interest paid.
*March 18, 2015*

**French, foreign language**

Read each definition and write the appropriate word or expression in the space provided. 1. C'est un plat typiquement français. On les prépare avec du beurre et de l'ail. Ce sont un escargot . (incorrect) 4.On les utilise pour faire des omelettes. Ce sont...
*March 18, 2015*

**French, foreign language**

Hi, I need help with answering some questions for French Here's my work on them tell me what you came up with for each question that is incorrect: 1.C'est un plat typiquement français. On les prépare avec du beurre et de l'ail. Ce sont un escargot (...
*March 17, 2015*

**calculus **

1.) Find the derivative of ((x + 3)/e^x) ^ (Log e X) 2.) T/F (log e X)' = (log e |x|)' 3.) T/F (Log e 7x)' = (log e x)' 4.) Find the derivative of e^(log e 7x)
*March 15, 2015*

**algebra**

What is a quadratic function?
*March 13, 2015*

**math (answer check)**

The coordinates of two vertices of triangle DEF are D(-5,5) and E(9,8). Determine two possible coordinates for for F that would make DEF a right triangle ? ans: slope DE = 8-5 / 9 - (-3) = 3/12 I don't know this part :how to Determine two possible coordinates for for F ...
*March 12, 2015*

**Physics**

A pilot wants to fly directly north to an airport 500 km away. His speed relative to the air is 100 km/h. Howevere there is a 40 km/h cross wind blowing from west to east. At what angle relative to the south north direction should he fly to arrive at the distant airport? How ...
*March 11, 2015*

**Foreign Language, French**

Can you please proofread my answers to the questions assigned by my teacher and correct me where needed? 1. découvrir / vieille / qu'est-ce qu' / dans / ils / valise / la Qu'-est-ce qu' ils veieille ont découvert la valise? 2. cette / nous / ...
*March 10, 2015*

**science**

Part I: Units of Measurement for Gas Laws For the following questions, use the following answer choices to indicate what each unit of measurement is used to measure (pressure, volume, or temperature). 1. atm 2. kPa 3. L 4. oC 5. torr 6. K 7. mL 8. cubic centimeters (cm3) ...
*March 2, 2015*

**chemistry**

everything
*March 2, 2015*

**chemistry**

Find the molar masses of the following compounds: 1. LiI 2. PbCO4 3. Mg(OH)2 4. (NH4)3PO4 Find the percent composition (percent by mass) of the given element in the following compounds: 1. Fluorine in AgF 2. Hydrogen in glucose (C6H12O6) 3. Oxygen in Fe2(SO4)3 PART II: ...
*March 2, 2015*

**Chemistry Help**

Thank you so much DrBob222. Now I understand.
*February 27, 2015*

**Chemistry Help**

I calculated the answer is 58.8%, but i'm not sure. Can anyone please help me make sure this answer please.
*February 27, 2015*

**Chemistry Help**

The theoretical yield of Cl2 that could be prepared by mixing 15.0 g of manganese dioxide (MnO2) with 30.0 g of HCl is 12.2 g. The limiting reagent was MnO2. When the reaction was run only 8.82 g of Cl2 was collected. The percent yield of Cl2 is_? a)58.8 % b)72.3 % c)29.4 % d)...
*February 27, 2015*

**Calculus II**

A square plate of side 3 m is submerged in water at an incline of 30 degrees with the horizontal. Calculate the fluid force on one side of the plate if the top of the plate lies at a depth of 6 m. (* The only thing i can think to use is the equation: p * g * (S from a to b of...
*February 26, 2015*

**6th grade geometry**

No, because the area of any triangle Is (height * width)/2. BTW I'm in fourth grade.
*February 25, 2015*

**Math**

Describe how to rename an improper fraction as a mixed number. Use an example to explain. I don't get the "renaming" part. Does it mean to explain how to convert it?
*February 24, 2015*