# Posts by LILY

Total # Posts: 1,534

**Science - chemistry**

Hi Im in year 7 and to get a level 6 we have to explain the big idea of energy. Our project is about the reation of iron and sulphur to make iron sulphide. We have been told to explain using the big idea of energy. pls help me asap!!!!

*February 5, 2015*

**math**

where the parentheses in 4=3-1+4/2

*February 3, 2015*

**math**

[4/1]

*February 3, 2015*

**math**

where are the parentheses in 3 times 2 minus 4 divided by 1

*February 3, 2015*

**chemistry(limiting reagent)**

Al2(SO3)3 + 6NaOH ----> 3Na2SO3 = 2 Al9OH)3 If 10.0g of Al2(SO3)3 is reacted with 10.0g of NaOH, determine the limiting reagent? help!!!

*January 27, 2015*

**math**

does anyone know how could you use an area model to identify the binomial factors of a trinomial? explain

*January 25, 2015*

**Math-polynomials**

1/2n^2 - 3/2n factorization, i got : n/2 (n-3) am i right or wrong?

*January 22, 2015*

**math (factors and products)**

does anyone know how could you use an area model to identify the binomial factors of a trinomial? explain

*January 22, 2015*

**Science**

It is B, trust me. It IS B.

*January 21, 2015*

**Calculus**

A balloon is rising at a constant speed of 5 ft/sec. A boy is cycling along a straight road at a constant speed of 15 ft/sec. When he passes under the balloon, it is 5 feet above him. Determine how fast the distance between the boy and the balloon is increasing 3 seconds after...

*January 14, 2015*

**science Help**

How did the discovery of the electron change the atomic model? A.it disaproved the earlier idea of an indivisible atom. B.it confirm that atom are very tiny. C. It exposed fraudulent experiments conducted by unqualified scientists. D. It proved that atom are easier to see than...

*January 14, 2015*

**math**

the number line below shows an estimate for the sum of 6/13 and 1/8. explain why the sum is greater than 1/2.

*January 11, 2015*

**language art**

Maybe d.

*January 9, 2015*

**language art**

In all together now Jordan states that there were marches and protest against segregation and discrimination in the 1960s. What make this statement a fact? A.it was stated In persuasive essay b. It is an emotional statement. C.it can be proven in an encyclopedia. D.it reveal ...

*January 9, 2015*

**computer and technology**

b and d. Not sure. I no its not c

*January 8, 2015*

**computer and technology**

I think is b and c

*January 8, 2015*

**computer and technology**

I think is c

*January 8, 2015*

**computer and technology**

A.d. I'm not sure if its right

*January 8, 2015*

**computer and technology**

It is important to verify internet source because. ----- choose that apply. A.the source should be written by real author. B.anyone can create a website and write false or inaccurate information on it c.you need to make sure it is owened by a government agency. D.websites can ...

*January 8, 2015*

**adding and subtracting rational**

15/16-3/4=

*January 7, 2015*

**adding and subtracting rational**

11/15+1/8=

*January 7, 2015*

**adding and subtracting rational**

-10 11/12-7 1/4=

*January 7, 2015*

**adding and subtracting rational**

5/6+4/9=

*January 7, 2015*

**math**

9.5x11.00=104.5 104.5x1.07=111.815 $111.82

*January 6, 2015*

**exponents ,factor,fraction**

Yes

*January 5, 2015*

**exponents ,factor,fraction**

The glee club has a set of 48 classical CD and a set of 42 show tune CD. Each set can be divided equally among the club member.what is the greatest possible number of club member. A.12. B.3. C.6. D.336

*January 5, 2015*

**exponents ,factor,fraction**

(X-b)^2+a^2for a=2,b=1,and c=7

*January 5, 2015*

**exponents ,factor,fraction**

7•7•7= 7^3. Or 3^7 Or 21 or 7^4

*January 5, 2015*

**equation and inequalities**

Graph the solution of the equation b-15=-12

*December 30, 2014*

**equation and inequalities**

Write a word phrase for 5 p

*December 30, 2014*

**subtraction rational number**

-11 1/8+15 5/12=

*December 30, 2014*

**Algebra**

w*9=9

*December 23, 2014*

**L.A help please**

Dick H. IV is right! I got a 100%! Thank You So Much!!! :D

*December 18, 2014*

**Math**

what would be the x intercept

*December 9, 2014*

**chemistry**

What is the solubility of calcium fluoride in a buffer solution containing 0.45 M formic acid and 0.20 M sodium formate? Given: Ka for formic acid = 1.7 x 10-4 Ka for hydrofluoric acid = 6.8 x 10-4 Ksp for calcium fluoride = 3.4 x 10-11

*December 3, 2014*

**chemistry**

A voltaic cell is constructed with all the reactants and products in their standard states. Will this condition hold as the cell operates? Explain.

*December 3, 2014*

**Social Studies**

Yeah, A,C,A,B is correct, thought they were being asses and went with D, but it was actually C :/

*December 1, 2014*

**Precalc**

Two lookout towers are situated on mountain tops A and B, 4 mi from each other. A helicopter firefighting team is located in a valley at point C, 3 mi from A and 2 mi from B. Using the line between A and B as a reference, a lookout spots a fire at an angle of α = 38° ...

*November 21, 2014*

**math**

Mandy is enlarging a photo that is 3 in. wide and 4.5 in long. if she wants the width of the enlargement to be 10 in, what will be the length??

*November 21, 2014*

**Economics help**

Why important is it to consider exchange rates when planning to travel to another country

*November 18, 2014*

**Derivatives**

If g(x) = tan (5x2), then g ′(x) = ? I've worked this problem out like four times already and I keep getting a complete different answer..So I think I'm doing it wrong. I keep getting these.. g'(x)= cosx^2 5tan g'(x)= 2cosxtan^2

*November 17, 2014*

**Calculus Can you help**

yay!

*November 17, 2014*

**Calculus Can you help**

Suppose the functions f and g and their derivatives have the following values at x = 1 and x = 2. Let h(x) = f(g(x)). Evaluate h′(1). X | f(x) G(x) f'(x) g'(x) ____________________________ 1 | 8 2 1/3 -3 2 | 3 -4 2π 5 My answer: -6π but I'm not ...

*November 17, 2014*

**Math help/check**

Suppose the functions f and g and their derivatives have the following values at x = 1 and x = 2. Let h(x) = f(g(x)). Evaluate h′(1). X | f(x) G(x) f'(x) g'(x) ____________________________ 1 | 8 2 1/3 -3 2 | 3 -4 2π 5 My answer: -6π

*November 16, 2014*

**Pre-Cal**

If g(x) = tan (5x2), then g ′(x) = ? I've worked this problem out like four times already and I keep getting a complete different answer..So I think I'm doing it wrong. These are the answers I have gotten while doing this problem. g'(x)= cosx^2 5tan g'(x...

*November 16, 2014*

**science Help**

Atomic theory is. A Subject to change if new information is discovered. B. A solution to the problem of differing isotopes. C. Unchanged able D. A descriptive table that list all of the element

*November 14, 2014*

**geometry**

What's a sample space???

*November 8, 2014*

**geometry**

Eddie is arguing with tana about the probability of flipping three coins. They decided to flip a penny, nickel, and a dime. Which would be better determining the sample space, a tree diagram or an area model? Justify your answer.

*November 8, 2014*

**geometry**

Use Pythaorean Theorem a^2+b^2=c^2

*November 4, 2014*

**chemistry**

How many molecules are in 105 g of sugar (C12H22O11)? Answer in units of molec

*October 31, 2014*

**chemistry**

How many hydrogen atoms are in 833 grams of water? Answer in units of atoms

*October 30, 2014*

**Math**

x= -4, 9

*October 29, 2014*

**AP Giannini**

Dexter makes a scale drawing of his room. In real life, the room is 10' wide and 12'6" long. In Dexter's drawing, the room is 4"wide, what measure should the length be? explain how you figure this out.

*October 15, 2014*

**chemistry**

how could solid magnesium phosphate be prepared and collected using hydrochloric acid, sodium phosphate solution, water and magnesium? For the answer, write a series of steps that describe the procedure and includes a balanced chemical equation for each step

*October 14, 2014*

**3rd garde math**

what is 12 x 12? im having a hard time can anyone help me??????????

*October 1, 2014*

**Trigonometry**

A volleyball player spikes the ball from a height of 2.44 meters. Assume that the path of the ball is a straight line. To the nearest degree, what is the maximum angle, θ, at which the ball can be hit and land within the court?

*September 30, 2014*

**Physics**

A meter stick weighs 200 grams and is supported at the center. Three masses of 100, 200, and 150 grams are placed respectively, at the 10-cm, 20-cm and 60 cm points of the meter stick. To balance the meter stick, where must a 300 grams weight be placed on the meter stick?

*September 28, 2014*

**Social Studies**

I need a website that has answers to this worksheet: Russia and Eastern Europe: CHERNOBYL - April 26, 1986.

*September 23, 2014*

**Math**

You see, ............nobody cares and I hate homework

*September 19, 2014*

**physics**

A state trooper’s car sends out a radar signal at a frequency of 13.3 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

*September 18, 2014*

**music**

How much music is in your head?

*September 18, 2014*

**math**

Which of the following situations describe quantities that combine to make 0? During the top of the fourth inning of a baseball game, the Ravens scored three runs. During the bottom of the fourth inning, the Raiders scored five runs to tie the game. Jacoby went on a hiking ...

*September 18, 2014*

**math**

a plane flew for 4hrs, 30 miles per hour and an adverge speed of 515 mph how far did it fly?

*September 17, 2014*

**AP CALC. AB**

1.Locate the discontinuity of the function y=1/(1+sin x) 2.Suppose that f is a continuous function defined for all real numbers x and f(-5)=3 and f(-1)=-2 . If f(x) = 0 for one and only one value of x, then which of the following could be x?

*September 14, 2014*

**math**

kfdnkl

*September 8, 2014*

**AP CAlc. AB Please helppp!!**

f(x)=|x|+1 Let A(r) be the enclosed by the x axis, the line x=-2, the graph of the function f, and the line x=r for any r=>-2 A) Write A(r) as a piecewise function with its joints at r=0 Please walk me through each step i am really confused!!

*September 8, 2014*

**AP CAlc. AB**

Thank you so much Steve!!!

*September 6, 2014*

**AP CAlc. AB**

limit x->0 (3k+k(x^2) sin(1/x)), if k is a positive constant

*September 6, 2014*

**comprehension**

Thank you so much!!!!

*September 5, 2014*

**comprehension**

can you please explain to me how it is 8 days so i can learn?

*September 5, 2014*

**comprehension**

thank you

*September 5, 2014*

**comprehension**

the grasshopper fell into a hole that was 3 meters wide and 2 meters deep. the grasshopper himself was only 5 centimeters long. over the course of a day he managed to climb 1/4 of a meter. if he continues at this rate how long will it take him to climb out the hole? A- 8 days ...

*September 5, 2014*

**English**

I'm writing a fable but I'm stuck for ideas. I like the morals don't judge a book by its cover and man is what he believes. I cant think of anything else but the story has to have animals as the characters. I can't get help from my teacher as we got this ...

*September 5, 2014*

**math**

how is the process used to multiply a fraction an a whole number similar to the process used to multiply two whole numbers?

*September 1, 2014*

**Algebra**

5.) A boat makes a trip downstream in 5 hours. The return trip against the current takes 12 hours. If the speed of the current is 3 1/2 km/h, what is the speed of the boat in still water? 6.) How far does the boat referred to in Exercise 5 travel (one-way)?

*August 31, 2014*

**Science**

It is A.

*August 28, 2014*

**p.e**

I do not go to connection academy. I go to arvada middle school and this is homework I need help on.

*August 26, 2014*

**p.e**

All aspects of health are equally important. A problem in one area can affect other areas. A. true B. False Is the answer false?

*August 26, 2014*

**p.e**

I wouldn't think it would be becauseyou can't control your friends so would it be d

*August 26, 2014*

**p.e**

You decide you are going to make more responsible health decisions. Which of the following risk factors can you control? A. there is a history of heart disease in your family. B. there is a higher incidence of high blood pressure in your ethnic group. C. your friends have ...

*August 26, 2014*

**p.e**

I thought that the answer was D because of the illness but my mom said I was wrong.Is the answer D?

*August 26, 2014*

**p.e**

Which of the following habits will most likely move you towards the illness end of the health continuum? A. maintaining supportive relationships with family and friends B. getting enough rest C. Dieting D. isolating yourself from others Is the answer a?

*August 26, 2014*

**English**

What's the relative clause in this sentence His questions revealed an intelligence that was beyond his young years

*August 19, 2014*

**Math**

the answer is c.)42

*August 13, 2014*

**Accelerated Algebra**

it takes 80 feet of fencing to enclose your garden. According to your calculations,you will need 350 square feet to plant everything you want. Is your garden big enough? Explain your answer. They gave a rectangle length=40-x and width= x I asked my mom and she also got ...

*August 10, 2014*

**physics**

An object carries a charge of -6.9 µC, while another carries a charge of -2.0 µC. How many electrons must be transferred from the first to the second object so that both objects have the same charge?

*July 28, 2014*

**physics**

Two spherical objects are separated by a distance of 1.53 × 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each ...

*July 28, 2014*

**physics**

A proton moves parallel to an electric field between points A and B. The change in the proton's electric potential energy is EPEB – EPEA. If the proton is removed from point B and replaced with an electron, how does the change in electric potential energy of the ...

*July 28, 2014*

**Physics**

Two objects separated by a distance r are each carrying a charge –q. The magnitude of the force exerted on the second object by the first is F. If the first object is removed and replaced with an identical object that carries a charge +4q, what is the magnitude of the ...

*July 28, 2014*

**Help english**

I need help with English comprehension.

*July 17, 2014*

**math**

find the straight line that passes through point (2,4) and is perpendicular to line 2x + 12y - 6 = 0

*July 5, 2014*

**computer system organization**

2. You're an IT professional, and your boss has asked you to prepare a briefing for senior staff on the comparative advantages and disadvantages of three competing tape drive technologies: Digital Linear Tape (DTL), Advanced Intelligent Tape (AIT), and Linear Tape Open (...

*July 1, 2014*

**Chemistry**

A solution of X2CO3 has a concentration of 15.2 g/dm^3. 25 cm^3 of this solution require 27.5 cm^3 of 0.2 M HCl for complete reaction. Calculate the ralative atomic mass of X

*June 28, 2014*

**fnu**

53.8%

*June 10, 2014*

**math**

A cylinder is 12cm tall and has a diameter of 3 cm. What is the surface area?

*June 8, 2014*

**math**

A polyhedron has 6 faces and 4 vertices. Use Euler's formula to calculate the number of edges.

*June 8, 2014*

**Algebra**

Using a standard 52-card deck, whats the probability of being dealt a pair of aces in a 5-card hand?

*May 28, 2014*

**Science**

Actually, you are wrong. It is solenoid, B.

*May 21, 2014*

**Science**

Correct.

*May 21, 2014*