Recent content by Elihu5991

@DrClaude I don't now how to find an actual value of x when there's only one real number in the equation: 10?

@Ray Sorry I'm on the iPad at the moment, so I can't just do that. I forgot to use the alternative. I was replying to you.

Will it be x^3 or cubed x?, since the function is "wrapped" to ^3?

Wouldn't there be a relationship, so I would first have to differentiate it? Thus, that function would then be the one for the average cost per unit? But it's asking for an actual value for x, which is throwing me off. Would I need to follow common procedure like other optimisation questions?

Your asking me what the question is asking in a simplified manner. I'm asking how to find the average. I'm unfamiliar with finding it with function specified.

I'm aware of what average means, though how would I find it with calculus? That, I'm not familiar with. I've done averages with actual numbers, not variables. Should I first differentiate it or do something else?

Homework Statement REFER TO IMAGE Homework Equations SEE ABOVE The Attempt at a Solution I haven't been able to start this question. I'm wondering how to find the 'average cost per unit'.

Sorry that my handwritiing is too messy and scan isn't done right. Just trying to get this done ASAP. (25-2x)(40-2x) y=(25-2x)(-2)+(40-2x)(-2) =-50+4x-40+2x =-90+6x x=15 Not sure what to next do.

Homework Statement SEE QUESTION IMAGE Homework Equations SEE ABOVE The Attempt at a Solution SEE WORKINGS IMAGE

Thanks I got the answer of 125cm which I checked in the back of the answers and is right. The way you explained it helped.

radians question sorry about that, if forgot to state my problem. i was wondering how to get the inner angles of the big and small wheel. i've been able to get 'alpha' and 'phi' but i don't know how to get 'theta' on the big wheel. if you can explain how i can get that then i'll be able to...

Homework Statement refer to question image Homework Equations refer to question image againThe Attempt at a Solution refer to working out image This is my brothers maths homework. He normally doesn't use online methods to request help and this is his first time.

Yeah that's true. I'm known for unintentionally doing so. From what I'm gathering I write it like this: \frac{x^{3}}{12} to x^{3}12^{-1} and then go from their by normally differentiating twice over to get the second derivative - consequently finding x for the coordinate to substitute into...

I'm Rich! "New Energy Source"! No, no. Just the measures the old lady took. Besides, it wasn't finding a friend more than being finding someone to continue the legacy. Does seem a little suspicious. And no, I'm not encouraging legal action.

Yeah it does seem to be the case. Though I'm getting really large numbers. I'm using the quotient rule twice to differentiate. Is that correct?