# Posts by jonathan

Total # Posts: 431

math
solve algebraically x^2 - 2y^2 = 11 y = x + 1

logarithms
Ive been staring at this problem for like a half hour now and I cant figure out where to even begin... log(base x)4 + log(base 8)squareroot(x) = 4/3 solve for x any help appreciated

algebra 2
that didn't simplify anything... it says that x=ln(1/5)/ln2

algebra 2
find the points of intersection of the following algebraically y=2^x + 4^x y=2^x+1 - 4^x+1 I set them equal to each other but not sure if you use logs or what to solve it

Science
deeznuts

Chemistry
The density of mercury is 13.54 g/cm3. Suppose you need 40 gm of mercury for an experiment. What volume of mercury do you need? A)2.95 cm3 B)541.60 cm3 C)26.46 cm3

Physical Science
If 30 N of force is exerted over an area of 20 m2, how much pressure is being applied in pascals?

math
the Angle of Elevation From a Ship to the Top of a Lighthouse on the Shore is 18 Degrees. If the Light House is 20 Meters Tall and at Sea Level How Far is the Ship From the Shore to the Nearest Meter..

calculus
lim x¨‡ 2x 3 +5x 2 −x 3 =

algebra honers (math)
he was assaulted

4root(3X>7)(y>9)(z>3)

algebra
simplify: 4root3x>7*Y>9*Z>3

SCIENCE
SUNLIGHT AND WIND ARE INEXHAUSTIBLE RESOURCES. EXPLAIN WHY THEY ARENT USED TO PRODUCED ALL OF OUR ENGERY

SCIENCE
SUNLIGHT AND WIND ARE INEXHAUSTIBLE RESOURCES. EXPLAIN WHY THEY ARENT USED TO PRODUCED ALL OF OUR ENGERY

Chemistry
11580sec

Organic Chemistry
What is the white solid that quickly forms when the methyl salicylate is added to the sodium hydroxide solution? I know that it is this equation but I wanted to know what is the name of the white solid: HOC6H4COOCH3 + NaOH „³ HOC6H4COO- Na+ + CH3OH

physics
You have a bathtub containing 100 ml of water at 25 degrees celcius. How long must you stir the water to bring the temperature of the water to 100 degrees celcius?

1.44x 10^25 atoms c X 1 mol C / 6.02 x 10^23 atoms C = Type in calc. The atoms cancel out and you have moles =).

Math
How would I find the formual of power function out of these 2 point? (5,75)(10,600)

Math
3/4

Physics
I've been working on this problem for quite some time now and still can not figure it out... Initially, both metal spheres are neutral. In a charging process, 1 × 1013 electrons are removed from one metal sphere and placed on a second sphere. Then the electrical ...

Physics
I tried using 1E13 as q1 and -1.6E-19 as q2, and I still got it wrong...

Physics
Initially, both metal spheres are neutral. In a charging process, 1 × 1013 electrons are removed from one metal sphere and placed on a second sphere. Then the electrical poten- tial energy associated with the two spheres is found to be −0.061 J . The Coulomb ...

physics
PLEASE EXPLAIN A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 × 10−19 J as it moves. Find the magnitude of the charge on the moving ...

Physics
PLEASE HELP WITH AS MANY AS POSSIBLE... I AM TERRIBLY CONFUSED. 1. A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 × 10−19 J as it ...

economics
Suppose that the consumption function is C=100+.8(y-t). Initially investment and government expendtures are I=75 and G=150 and taxes are T=50. 1.Depict this economy using the keynesian cross. calulate the initial equilibrium income. how much will income increas if government ...

Biology
Please help me list some of the major differences in the process of mitosis as it occurs in higher plants and as it occurs animals.

Math
Gilda ran a 26-mile marathon. About how far would her sister have to swim to use the same number of Calories Gilda used during the marathon?

you did it right up until: t = log(920/314) = 0.465, I have no idea how you got those numbers but it's t(log(1.05/.92))=log(1000/300) t(log(1.1141304348)=log(3.3(rpt.)) t(0.057401472)=0.522878745 t=(0.522878745)/(0.057401472) t=9.1092

what is the constant in th

Math - Pre- Clac
Ok thanks, I did make a typo my bad.

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.

Science
4 and 1

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

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
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 that's 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 ...

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 ...

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.

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 the 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

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.

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