Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 302

**Math - Pre- Clac**

Prove that each of these equations is an identity. A) (1 + sinx + cos x)/(1 + sinx + cosx)=(1 + cosx)/sinx B) (1 + sinx + cosx)/(1 - sinx + cosx)= (1 + sin x)/cosx Please and thankyou!

**Math**

The sum of John's age and twice of his son's age is 56. In 8 years time, the son's age will be half of john's age. Find there present ages. Right now I wrote down an equation x+2y=56 and not quite sure what to do next.

**Math**

if a^2-b^2=10 and a-b=2 what is the vlaue of a+b

**science**

what are some interesting facts about the sun?

**science**

Why should you visit the sun? what is special about it?

**science**

where is the sun located.

**Government.**

The main reason why the Constitution dealt specifically with the crime of treason was that: A. The framers wanted to prevent all treason in order to protect the democracy. B. Treason was not considered a serious crime before the Constitution was written. C. Treason was a crime...

**genology**

well they find a way to get close to the valcanoe

**genology**

well they

**science**

word containing the word rock with ice only

**Economics**

Pls advise.. The max units of good A is 180 The max units of good B is 60 In general terms, what happens to the opportunity cost of good A as the output of good A increases? In general terms, what happens to the opportunity cost of good B as the output of good B increases?

**MATH**

X-4=3x+12 X=? please help

**rudcing fractions**

10 100

**physics/math**

A car moves at 12 m/s and coast up a hill with a uniform acceleration of -1.6 m/s^2..What is its displacment after 6 sec.? What is its displacment after 9 sec.?

**math**

how do i find the raidis of a sphere? sa= 36*22/7 in sq

**Macroeconomics**

I have an assignment question regarding the impact of reducing the government's budget deficit by reducing government purchases. I have to develop a S/D graph with curves to illustrate this impact. I know that when the government makes purchases and runs a deficit, supply ...

**Math!!!**

kk ty bro

**Math!!!**

A=(-7,-18),B=(3,y),C=(x,6) and the slope of the line=3/5 x=? y=?

**math**

using the terms factor,divisor,multiple,product,and divisible by,write as many statements as you can about the number sentence 4x7=28.

**Math - Factors**

using the terms factor,divisor,multiple,product,and divisible by,write as many statements as you can about the number sentence 4x7=28.

**Math - Factors**

using the terms factor,divisor,multiple,product,and divisible by,write as many statements as you can about the number sentence 4x7=28.

**Math - Factors**

using the terms factor,divisor,multiple,product,and divisible by,write as many statements as you can about the number sentence 4x7=28.

**math**

5x+1=6 x=?

**Math**

Do i mulitply the equation my 5,3?

**Math**

One-third the sum of a number N and 5 is 2 more than one-fifth the sum of N and 3. N= ?

**PreCalc**

What is the real solutions of this equation? sqrt(2x+3)-sqrt(x+2)=2

**Math**

thank you!

**Math**

When a rock is put into a tank full of water, water is displaced and is collected by a container. If the base of that container is 12cm x 15cm and the water level is 4.5 cm, what is the volume of the rock?

**Redox Half Reactions**

Half reaction of 2 Al2O3 + 3 C → 4 Al + 3 CO2

**Aluminium Bauxite (is water needed)**

Is water needed in the extraction of aluminium from bauxite in either the Bayer or Hall-Heroult proccesses? Please reply as soon as you can :) hehe

**Maths**

i knew that was wrong, coz my answer should be in the 50's haha..thanks though, great help can i ask how you got sinA and sinB with that information :) no point in me just copying it i would like to know how you got it

**Maths**

well, i got: (-4/5)(12/13) - (4/5)(7/13) therefore (-48/65) - (28/65) therefore: answer = (-76/65)

**Maths**

yeah thats right, can u go on?

**Maths**

if cosA = 4/5; sin <0; cosB = 12/13; 0<B<90, determine sin(A-B) thanks ... :)

**Science**

I desperatly need help, i need to know everything there is to know about the recovery of ALUMINIUM that is recovered from BAUXITE ORE, the process, the cost, everything. Please, if you have any knowledge or know of any GOOD webpages, please post them here. thanks:)

**science**

What is the difference between RNA and DNA that can be used to separate them from one another?

**Math**

Factorise: a)x squared - 5x b)x squared - 81

**geography**

name at least two state capitals that have two or more words in their names

**Chemistry**

What are compunds that are composed of molecules called?

**Chemistry**

The nuclide 12 N 7 is unstable. What type of radioactive decay would be expected??? my guess is either gamma or beta. are either of those correct?

**Nuc. Chem**

Oh okay so for this one would it be: 40 Ar 18???? thanks so much for your help!

**Nuc. Chem**

HELP!!! I have like 20 of these kinds of questions on my homework and no clue how to solve them. Electron capture transforms 40 K 19 into what nuclide?!?! Thank you

**Trig word problem**

A park ranger at point A sights a redwood tree at point B at an angle 23 degrees from a fire tower at point C, From the fire tower, the Angle between the ranger and the tree is 123 degrees. If the ranger at point A is 2.3 miles from the fire tower at point C, how far is it fr...

**trigonometry**

In triangle ABC, a=8, b=15, and m<C=40 degrees. Find the area of the triangle to one decimal place.

**trig WORD PROBLEM**

A park ranger at point A sights a redwood tree at point B at an angle 23 degrees from a fire tower at point C, From the fire tower, the Angle between the ranger and the tree is 123 degrees. If the ranger at point A is 2.3 miles from the fire tower at point C, how far is it fr...

**trig**

In triangle ABC, find <A to the nearest tength of a degree is m<B=95 degrees , b=15.4, a=8.0

**trig**

Two ships, one sailing at 30 km/hr and the other at 45 km/hr, left port at the same time. Three hours later they were 120 km apart. If you had to find the angle between their courses an equation that could be used to solve this problem is:

**pre algebra**

2x+3y=6 2x=6-3y [subtract 3y to solve for x] x=(6-3y)2 [divide by 2 to get x by itself] 2x+3y=6 3y=6-2x [subtract2x to solve for y] y=(6-2x)/3 [divide by 3 to get y by itself]

**CHEMISTRY**

could you please check my work? thanks. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g)-----> 3 C (g) a. find the rate of ...

**science**

nucleotide monomers a nucleotide is composed of: A Nitrogenous Base (purine or pyrimidine) A Five-Carbon Sugar A Phosphate Group

**Chem Urgent!**

the atomic mass in the periodic table represents the number of grams per one mol of lead. so there are 207.1 g per mol of lead.

**French**

oui, partager [the infinitive of partage] means share.

**AP CHEM-URGENT PLEASE**

could you please check my work? thanks. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g)-----> 3 C (g) a. find the rate of ...

**Chemistry**

HELP! we just started kinetics and i have no clue how to solve this problem. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g)-...

**Chemistry**

thanks!

**Chemistry**

why does the value of i (van t' hoff factor) change with regards to theoretical vs. experimental? i'm not quite sure what happens but i know it has to do with ions in the solution. could it be attractive forces between ions?

**CHEMISTRY**

thank you so much! the molar mass was a major problem...i didn't realize i was so off. thank you for pointing that out.

**CHEMISTRY**

For a lab, I have to find the experimental values of i (Van T'Hoff factor). so far this is what i have, but it's incorrect. could you please tell me what i'm doing wrong??? thanks. given info: the lab varied the concentration of Mg(NO3)2 the theoretical value of i ...

**Chem=continued**

thank you. i'm confused thought....i tried to use a formula that already had molality in it because i don't have a mass to use, hence the g/GMW kg portion. i need to use 175 mL and make it boil at 245 degrees F.

**Chem=continued**

I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL C2H4(OH)2 175mL-X...

**AP CHEM**

I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL C2H4(OH)2 175mL-X...

**math**

Tom is now 25 years older then his son. In 10 years, Tom will me 5 years younger than 3 times his sons age. how old is tome now?

**math**

there are 50 question in a test. a student gains 2 marks for a correct anwser and loses 1 mark otherwise. if a student has 76 marks, how many question did he answer incorrectly?

**math**

an apple cost 20 cent and a orange cost 25cent. if teh total number of apples and oranges is 20 and the total cost is 4.55, how many oranges are there?

**math**

omg ty u are a super pro

**math**

There are 9 more quarter then dimes.if the total value of the coins is 6.8, how ,any quarters are there?

**math**

how do you solve for 2/3 * ? = 20

**science**

what is a set of actions that a living thing is born with and does not need to learn called

**Physics**

dont no

**Physics**

dont no

**Algebra II**

Solve x^2>_2x+24 x^2-2x-24>=0 (x-6)(x+4)>=0 So as long as x>6, it works. But what about two negatives? Try x=-5..checks...check me on that. So it looks as if -inf<x<=-4 works, and 6<=x<inf works. check that.

**Algebra II**

Write y=x^2+4x-1 in vertex form. y=x^2+4x-1 y=(x^2+4x+8)-1-8 y=(x+2)^2-9 This isnt one of my answer choices,what am I doing wrong? in second line: y=(x^2+4x +4 )-1 +4 (take one half of the middle coefficient, then square it) y=(x^2+4x + 4 )-1 - 4

**Algebra II**

Solve x^2+2x=-2 by graphing and indicate the roots.Please and thank you We can't draw graphs for you here. The roots are x = -2.73 and -0.73 I suggest you make your own graph of y = x^2 + 2x and see where it crosses the horizontal line y = -2. Choose x values of -4, -3, -2...

**algebra II**

Help me solve this problem that I missed, so that I can see where I went wrong. Synthetic Division (3X3 -2x +5). (x-2) I would set it up with the following algorithm to do synthetic division (this is how I do it and how I taught it, the ----- are simply there to keep the colum...

**Documenting a website for research paper**

I cant find it in my text book, can someone tell me how you document a website for the bibliography. also in parenthetical foot note things in the paper do you just use the author of the website? oh also, if the site doesnt tell the author??? (Broken Link Removed) Hold your cu...

**Alexander the great fact**

I have a research paper due shortly and well when i was taking notes i didnt label a few of them(stupid i know) so now, I returned the books to the library, and i wrote the paper, and one fact which I think is good is that the seers he brought with him said the gods were again...

**math**

8 workers together at the same rate finished a painting job in 5 hours. hour long would it take 12 such workers working at the same rate to finish the same job? each worker finished____(fraction) of the job in one hour. 12 workers finished_____(fraction) of the job in one hour...

**Physics**

The 2-cm (radius) current loop shown in the figure is changing from Î¸1 = 11 degrees to Î¸2 = 66 degrees in a magnetic field 2 T in 0.5 seconds. What is the magnitude of the induced emf to the nearest hundredth of a millivolt? The wire in Problem 2 has ...

**Research Paper**

can someone tell me what the MLA style is? my textbook is requiring it for my paper but is not explaining it? Here are some MLA websites; the first one is the most thorough and the best: (Broken Link Removed) http://owl.english.purdue.edu/owl/resource/557/01/ Please repost if ...

**Japan**

social studies) Question:How many distance is Japan from the US? It is 6760 from New York Ciy to Tokyo It is 4791 miles from Seattle to Tokyo It is 3862 miles from Honolulu to Tokyo It is 2444 miles from Anchorage to Sapporo Take your pick The last entry (2444 miles) is actual...

**word riddle help please**

what material is something that a person doesn't have?

**lively**

Suppose that four times the square of a number equals 20 times that number. Whatis the number? It'll take you 45 seconds if you just plug in a few numbers Again -- putting the subject in the subject line helps. =) 4 n^2 = 20n zero is one solution. Solve for n.

**lively**

Suppose that the width of a certain rectangle is three-fourths of its length, and the area of that same rectangle is 108 square meters. Find the length and the width of the rectangle If you put the correct subject in the subject line, you're likely to get a faster response...

**Economic**

marketing

**Research Paper**

I have to write a research paper but I dont know what to pick as a topic. I want something simple. Last time i chose Napoleon and it was overwhealming. Can anyone suggest a simple topic that is easy to research. Preferable historical. Mozart disco John Kerry some topics that m...

**world geography**

The native people of Australia are known as

**communications**

simple subject notes Please explain more exactly what you need and we'll be glad to help you.

**science**

d. a beak and wings

**Math**

which fraction is less than 6/7 a)9/8 b)8/9 c)10/8 d)13/14 e)5/9

**physics**

what is is called (both terms) when somthing makes a sound but no one is aroun to here it? Plz this is 4 my h work It could be many terms. Unobserved Source comes to mind. Surely you are not wasting much class time in physics class on this.

**maths**

what is the largest domain of the following functions f(x)=3x-5 f(x)=square root of (x+4) f(x)= 2 over x-4 f(x)= sqaure root of (x2-9) f(x)= 2 over x(x+7) Hopefully you've solved these by now. I just noticed the question and see there's no reply. The question is "...

**Type Sketch - Cynic**

I have to do a type sketch of a cynic...but i really am running out of ideas...this is what I wrote so far but i need a couple more points. Any ideas please? ************************************* The cynic is a person who is skeptical of life. They are weary of the motives of ...

**Report on Middle Class Today!**

I got this assignment and I have to do it TODAY! Write an essay on the necessity of a content, hard-working, middle class to the maintenance of a democratic government. I really have no idea what to write and i need to have it done today. Can anyone please give me some sugesti...

**History - Vercingetorix**

I have to write a report on the Gallic king Vercingetorix. It needs to be 1 - 2 pages long but I cannot find very much information on the web.(ive seen Wikepedia ect..) Could anyone refer me to a website containing information on him? I have to finishe this report in 2 days. H...

**Algebra 2**

I have no clue on this one. How would you solve: us the (IN) key to express each number as a power. Then use the rules of logarithms to find the answer. (45,332 x 10^5)(33,654 x 10^-4) ------------------------------- 93,153 (that is a fraction.) please help.

**Algebra 2**

how would you solve: the current in the river flowed at 3 mph. The boat could travel 24 mph downstream in half the time it took to travel 12 mi upstream. what was the speed of the boat in still water? please help. The time required to go any distance upstream a distance L is L...

**MATH EMERGENCY!!**

Please help. I know I asked this before, but the answer was lost during the upgrade. Show that 0.00317 is a rational number by writing it as a quotient of integers. (the 317 has a line over it.) please help. thats hard really hard im in grade 5!!!!

**Algebra2 again**

How do you: Complete the square as an aid in graphing. [I put exponents in ().] y = x(2) + 4x - 2 Please Help? The complete square of the x^2 binomial is x^2 + 4x + 4 = (x+2)^2 Therefore, add 6 to each side of the equation and you will have this still-valid equation with a per...

**Algebra2**

How do you get: Show that 0.00317 is a rational number by writing it as a quotient if integers. (the 317 has a line above it.) Please Help? Bob Pursley showed how to do that very question in an earlier post. Look back perhaps 2-3-4 days and you will find it. I did look earler,...

**math question corrected**

a farmer bought chickens, goats and sheep. the cost of a chicken is .50 goat is $3.50 and sheep is $10 He bought 100 animals and spent $100. how many of each animal did he buy please help! I need this for school tomorrow Since you have two equations and three unknowns, there a...

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