Lucy X

Can someone check my answer? 5x^3 - 40 =5(x^3-8) =5(x-2)(x^2+2x+4) Also, how do you factor x^6-y^6 as a difference of cubes? As a difference of squares, is it (x^3+y^3)(x^3-y^6)?

17 years ago

A cell can no longer supply energy when it cannot provide a closed path for electrons and ions to travel. Based on your knowledge of cells and batteries, where can a cell fail? Provide 3 specific examples. Unfortunately, the only example I can think of is...

17 years ago

What is the importance of maintaining an isolated system in calorimetry experiments? I know the basic parts - calorimetry is the experimental process of measuring changes in a chemical system & an isolated system is one where neither matter nor energy can...

16 years ago

Why is it possible to have an accurate value of the energy of a hydrogen-hydrogen bond, but not of a carbon-oxygen bond? I know carbon and oxygen can form both double and single bonds, and hydrogen can only form single bonds. But apparently C=O has two di...

16 years ago

I'm describing the properties of a molecule, and I'm wondering if it's correct to say this - Physical properties: Fine, white, crystalline, powder OR should I remove the commas and write - Physical properties: Fine white crystalline powder

16 years ago

I have to build a model of a molecule and I was wondering how to determine its bond lenghts. (It has C-H, C-O, C=O, C-N, C-C & C=C bonds.) Also, will the lengths of all of one type of bond be the same throughout the molecule? Er...for example, if I found...

16 years ago

If tan(x)= -(3/4) and x is obtuse, evaluate sin(2x). How do I get started on this question?

16 years ago

Can you please help me solve this trig equation for 0 ≤ x ≤ 2π? 9sin^2(x)-6cos(x)-10=0 Thank you!

16 years ago

What are some benefits of aquaculture? I know there are economic benefits, but what else? **Also can you help me expand a bit more on the economic benefits? Thanks.

16 years ago

Are bond lengths measured from the center of the atom to the surface? Or from the surface to the surface of atoms?

16 years ago

Can someone show me the steps for solving this logarithm? log₄x+log₄12=log<sub4</sub>48 Thanks!

16 years ago

How do you convert 10 Hz to seconds? I know that Hz = s^-1 or 1/s, but I don't understand how to convert the units.

16 years ago

George has calculated that he can jump the gorge if the ramp is inclined to 45 degrees, and he attains a speed of 20 m/s. Will George make it? If not, how far short of the other side is he when he drops below the level of the ground? ----------------- Wha...

16 years ago

A child on a toboggan slides down a hill with an acceleration of magnitude 1.5 m/s^2. If friction is negligible, what is the angle between the hill and the horizontal? --- I don't even know how to get started on this question. Well, I first drew the free...

16 years ago

(Apparently, I'm not allowed to post URLs, but this question is better illustrated by a diagram, i39. tinypic. com/ 17e336. jpg) <--P--[BOX A]<--Q--[BOX B]<--R--[BOX C] There are three boxes attached together with string and being pulled across a friction...

16 years ago

A 0.25-kg ball is attached to a 26-cm piece of string. The ball is first raised so that the string is taut and horizontal, then the ball is released so that, at the bottom of its swing, it undergoes an elastic head-on collision with a 0.21-kg ball that is...

16 years ago

A delivery business plans to serve three towns on a stretch of highway. For every trip they make to town A, which we'll place at position x=0, they expect to make two trips to town B (at position x=1) and 3 trips to town C (at position x=4). If they build...

16 years ago

Hey, I posted this question before, but I really need some help. Thanks... -- A delivery business plans to serve three towns on a stretch of highway. For every trip they make to town A, which we'll place at position x=0, they expect to make two trips to t...

16 years ago

Okay, I want to find the derivative of (x^x)^(x^x)... Well, I already went through the process of finding the derivative of just x^x (I used ln to do this). This is what I found... dy/dx = x^x(lnx+1) So now I want to find the derivative of (x^x)^(x^x) (us...

15 years ago

Is crystallization a chemical or physical change?

14 years ago

Thanks. Am I supposed to use the inverse trig function to find the angle?

16 years ago

Edit: Aquaculture as in fish-farming...

16 years ago

EDIT: It's log₄x+log₄12=log₄48

16 years ago

Well, I graphed d(x). I'm not sure how I am supposed to use it to determine the best position... Sorry, I don't understand how to do the cost function, since no cost information is given...

16 years ago

Thank you.

14 years ago