Tuesday

October 25, 2016
Total # Posts: 364

**Math- Algebra II**

Thank you so much!

*February 16, 2011*

**Math- Algebra II**

Please check if I did this right... √(2x+1)+7= 3 -7 -7 √(2x+1)= -4 Square everything √(2x+1)^2= -4^2 2x+1=16 -1 -1 2x=15 divide by 2 on both sides x=7.5 CHECK: (Plug it in) √(2(7.5)+1)+7= 3 √(16)+7= 3 4+7=3 11 doesn't equal 3 so the answer is ...

*February 16, 2011*

**geometry**

how do you find the lenght of the midsegment of a trapezoid when one base equals 21 and the other 17 ?

*February 15, 2011*

**business calculus**

composite funtions

*February 12, 2011*

**stoichiometry**

Lick balls.

*February 9, 2011*

**physics**

A clump of soft clay is thrown horizontally from 30.63 m above the ground with a speed of 30.0 m/s. Where is the clay after 3.8 s? Assume it sticks in place when it hits the ground

*January 27, 2011*

**Math**

Simplify 1/2x-3/x+6

*January 25, 2011*

**answer**

0 (4), 1(5)

*January 20, 2011*

**physics**

20 newtons

*January 16, 2011*

**Math**

thanks for the help

*January 12, 2011*

**Math**

y=-2x+1

*January 12, 2011*

**Math**

y=2/3x-1

*January 12, 2011*

**math **

eggs spear a mint

*January 12, 2011*

**math **

What were the headlines after a mad scientist trained two eggs to attack a candy store with sharp sticks?

*January 12, 2011*

**math graphing the y-intercept**

solve for y set equation equal to each other solve for x use "x'' value to fo y

*January 12, 2011*

**Thermodynamic**

274.2kj

*January 10, 2011*

**Math**

50= A+S 2s+3a= $135 s= -a+50 2(-a+50) + 3a= 135 Now solve for a then plug in what you get for a and solve for s

*January 9, 2011*

**World History**

1450-1750 C.E With the Asian Trading Network.

*January 9, 2011*

**World History**

How did the Europeans establish and maintain their trading empires with Asia? ? idk help

*January 9, 2011*

**Science**

Temperature

*January 9, 2011*

**Chemistry**

The liquid to gas phase transformation (evaporation) is an endothermic process. It requires heat to be accomplished.

*January 9, 2011*

**Probability**

urn1 contains 3 red chips and 1 white chip. urn2 contains 2 red chips and 2 white chips. 1 chip is drawn from each urn and transeferred to the other urn. then a chip is drawn from the first urn. what is the probability that the chip ultimately drawn from urn1 is red

*January 6, 2011*

**HELP IN ENGLISH **

Would the fact that the title is called Bloom because the girl in the book blooms open her new personality be a symbol or irony?

*January 5, 2011*

**English**

Would the fact that the title is called Bloom because the girl in the book blooms open her new personality be a symbol or irony?

*January 5, 2011*

**English **

so it would be Magic realism, USA?

*January 5, 2011*

**English **

The book is Bloom by Elizabeth Scott and the copyright date is May 2007

*January 5, 2011*

**English **

I'm writing a Precis of a book and it asks to to put the literary period and country I tried to look but I still don't really understand. Thanks

*January 5, 2011*

**math**

try looking over old notes, and memorizing formulas that are commonly used.

*January 5, 2011*

**algebra**

To solve the inequality -1/2 k is greater then or equal to -5, Danny multiplied both sides by the reciprocal of -1/2 . His solution was k is greater then or equal to 10.What mistake did he make? Danny checked his solution, but his check did not let him know that he had made an...

*December 9, 2010*

**World History**

brazil they didn't have forced labor becuase the afican's did it. whereas in Portugal there was much forced labor

*December 8, 2010*

**World History**

How did the Portuguese experience in Brazil differ from the Spanish experience in Latin America? ... I don't really have any idea HELP please.

*December 8, 2010*

**World History**

THANK YOU.

*December 8, 2010*

**World History**

By building colonies?

*December 8, 2010*

**World History**

how did the caribbean serve as a model for the spanish empire?

*December 8, 2010*

**World History**

What Iberian institutions were transplanted to the Americas?

*December 8, 2010*

**English**

The Swing by robert louis stevensen

*November 25, 2010*

**US History**

Why do you think freedom and independence were so important to the colonists?

*November 19, 2010*

**history**

Why was the destruction of the buffalo significant to the lives of Native Americans on the Plain?

*November 9, 2010*

**history**

thanks

*November 9, 2010*

**history**

assimilation into American culture

*November 9, 2010*

**geometry**

plug in whatever points they gave you into the midpoint formula

*November 8, 2010*

**Chemistry**

What is the difference between and orbit and an electron orbital?

*November 8, 2010*

**World History**

How did religion and trade connect Africa to a larger world; with what results?

*November 8, 2010*

**World History**

What factors contributed to Islam's spread to south and southeast Asia?

*November 8, 2010*

**Spanish 1**

Hey the person above stole my name!

*November 8, 2010*

**Spanish 1**

12.d 14.c

*November 8, 2010*

**U.S. Government**

how can a young citizen become active in politics?

*November 5, 2010*

**English**

What is an essay-style question, and how would I write one about a book I read? I don't have to answer the question

*November 2, 2010*

**Math**

What is the answer and how the steps to solving y-15/32=2 6/7

*November 1, 2010*

**math**

kelly subtracted 2.3 from 20 and got 17.7 explain why this answer is reasonable

*October 26, 2010*

**grammar**

men fish gulf of mexico

*October 10, 2010*

**chemistry**

If a mole of hydrogen gas (H2) contains 6.02 x 10^23 molecules, how many molecules are there in 10.0 moles of hydrogen gas? Answer 60.20 x 10^23 molecules 6.0 x 10^23 molecules 6.02 x 10^20 molecules 6.02 x 10^24 molecules None of these is correct. would it be 6.02x10^24 or ...

*September 28, 2010*

**ap history**

when did american economic institutions began to be shaped in a capitalist framework? A.during the colonial period B.during the federalist era C.during the jacksonian era D.during the civil war E.during the late 1890s

*September 26, 2010*

**science**

a nickel is about 2 millimeters thick,or 2/1,000 of a metter. how many nanometers is?

*September 20, 2010*

**science**

i don't see it

*September 20, 2010*

**Maths**

A box with no top is to be built by taking a 6'' - by - 10'' sheet of cardboard and cutting x - in. squares out of each corner and folding up the sides. Find the value of x that maximizes the volume of the box.

*September 19, 2010*

**math**

I need real life example word problems using to ngative interjers.

*August 31, 2010*

**Calculus**

X2-7x-12/x-2

*August 9, 2010*

**Individual Income**

A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

*June 30, 2010*

**Calculus**

What is the derivative and second derivative of 3x/(x^2-4)

*June 22, 2010*

**Vectors**

The point P(-1,0,1) is reflected in plane y-z=0 and has P' as its image. Determine the coordinated of point P'

*June 20, 2010*

**dress making**

For cutting dress fabric, it's recommended that you use

*June 1, 2010*

**chemistry**

How can one create an experiment that will deteremine the Ksp of a solid like Ca(OH)2

*May 29, 2010*

**Chemistry**

So far i have deltaH= 20g x 4.18 j/g deg C x 80 deg = 6.688KJ AND DELTA H= 1.11mol x 40.8 KJ/Mol = 45.3 kj but i don't know what to do next :(

*April 27, 2010*

**Chemistry**

If 55.0 kJ of heat are added to 20.0 g of water at 20oC, what is the final temperature of the system?

*April 27, 2010*

**chemistry**

A thimbleful of water at 100 deg C has a higher temp than a swimming pool full of water at 20 deg C, but the pool has more thermal energy than the thimble. Explain why this is possbile?

*April 26, 2010*

**Chemistry**

Some polymers are flexible when pulled one way but not another(example:milkbags). Can someone please explain why this happens?

*April 19, 2010*

**calculus**

Two roads intersect at an angle of 48º. A car and truck collide at the intersection, and then leave the scene of the accident. The car travels at 100 km h down one road, while the truck goes 80 km h down the other road. Fifteen minutes after the accident, a police ...

*April 15, 2010*

**calculus**

Three ships are at points P, Q, and R such that PQ=2km PR=7 km, and <QPR=142. What is the distance between Q and R, to two decimal places.

*April 15, 2010*

**Calculus**

A certain radioactive material decays exponetially. The percent, P, of the material left after t years is given by P(t)= 100(1.2)^-t a)Determine the half life of the substance

*April 13, 2010*

**Calculus**

How can i find the ln of both sides of the equation? 6=6e^3x and O.2= e^-kt

*April 13, 2010*

**Calculus**

How do i find the second derivative of f(x)= tan(1-x)^1/2

*April 13, 2010*

**Calculus**

How can i find f''(x) of the function f(x)= 2(cosx)(sec^2x)

*April 11, 2010*

**Calculus**

A fence is 1.5m high and is 1m from a wall. A ladder must start from the ground, touch the top of the fence, and rest somewhere on the wall. Calculate the minimun lenght of the ladder. I drew a diagram and i ended up with a right angle triangle. i made the hypotenuse the ...

*April 10, 2010*

**physics**

6. If you applied a force of 200N to push a box along the floor at a constant velocity, what is the net force on the box? What is the force of friction on the box?

*April 4, 2010*

**physics**

67-3 = 64 x 3.10 = 198

*April 4, 2010*

**Calculus**

How can i factor x^3 - 3x^2 + x -4? I tried the factor theorem method, but it doesnt work. Is there another method for factoring cubic equation? Is there a formula that one can use?

*April 3, 2010*

**Calculus**

When given only graph of f(x)(no equation), how can one graph f'(x) and f''(x)?

*April 3, 2010*

**biology**

a scientist finds no evidence that species in a community are competing and concludes that competition never played a role in the development of this community. is this conclusion valid?

*March 29, 2010*

**biology**

in a relationship that is an example of commensalism, would the species that is neither helped nor harmed evolve in response to the other species?

*March 29, 2010*

**biology**

in japan, native honeybees have evolved an effective defense strategy against giant Japanese hornets. imported European honeybees, however, are unable to defend themselves. explain this in terms of coevolution?

*March 29, 2010*

**Chemistry**

How does the molar mass of molecules affect the boiling points? e.g MOlar masses HI-->127.9 HF--->20.07 HCl---> 36.45 Boling points HI-->-35.55 HF---> 20 HCl--->-114.17 can it be said that except for HF molecule, as molar mass increases the boling points alos...

*March 27, 2010*

**Chemistry**

Are the intermolecular forces that are acting ont the molecule HF as follows: dipole-dipole, ionic and hydrogen bond

*March 27, 2010*

**Math**

Use synthetic division to divide. (4x3 + 26x2 + 10x - 12) ÷ (x + 6)

*March 17, 2010*

**Math**

Divide as indicated. (-2x5 - x3 + 4x2 + 58x - 20) ÷ (x2 - 5)

*March 17, 2010*

**Chemistry**

How does the process of chromium electroplating work?

*March 9, 2010*

**Chemistry**

How does the process of chromium electroplating work?

*March 9, 2010*

**Calculus**

4. Find the dimensions of the largest isosceles triangle having a perimeter of 18 cm. Answer ( all sides 6 cm) i really need help with coming up with the equation of the function before solving its derivative and making it equal zero so far i know 2x+y=18

*March 9, 2010*

**French**

Les visiteurs m'appellent un bebe. You made a mistake with the present third person of the verb appeler.

*February 27, 2010*

**Calculus**

How do i find the derivative of f(t)= 20- 30/rooot 9 + t^2 heres how i did it f'(x)= 20' - 30/root(9+t^2) ' = 0 - 30/root(9+t^2) ' (Quotient rule) f'(x)= 30' (root(9+t^2) - 30(root(9+t^2) ' f'(x)= -30(0.5(9+t^2)^-0.5) (2t) the answer at the back...

*February 27, 2010*

**chemistry**

a galvanic cell: A copper electrode is placed in a Cu(NO3)2 electrolyte. An iron electrode is placed in a Fe(NO3)3 electrolyte. a) What will happen to the voltage if sodium sulfide solution was added to the copper solution(I found that CuS(solid precipitate) will be formed, ...

*February 21, 2010*

**chemistry**

Why is it that an electrochemical cell(galvanic cell) cannot operate forever?

*February 20, 2010*

**chemistry**

How does the voltage of a galvanic cell change, when there is a precipitate in the solution?

*February 20, 2010*

**Chemistry**

TestubeA: KMnO4 + H2S04 + NaHSO3---->MnSO4+ K2SO4+Na2SO4 (colourless solution) a) if test tube a wasn't acidic enough, what colour might you expect in the products.

*February 14, 2010*

**CHEMISTRY**

reaction KMnO4+ EDTA(ethylenediaminetetraacetic acid) + MnSO4(s)---> MnCl3 (Violet/Rose solutions) note: Mn is being reduced. a) What is the catalyst in this reaction above? b)What is the role of EDTA in the reaction above

*February 14, 2010*

**chemistry**

Testtube B: Has a solution of KMnO4 + NaOH+ NaHSO3----> K2MnO4 (green coloured-solution)+H2O+Na2SO4 If too much HSO3^1- was added to this solution above, what would be the resulting colour and why

*February 14, 2010*

**math**

Well all u have to do is to get a calculator and divide 310000 by 9 310000DOLLAR/9PLP= 34444.44DOLLARS PER PERSON. So each person gets $3444.44

*February 14, 2010*

**chemistry**

defie le chatelier's principle and the role equilibrium plays in the reduction of stress

*January 22, 2010*

**english**

how is the way lady macbeth behaves in private to the way she behaves in public?

*January 11, 2010*