Recent content by cptstubing

Thank you all.

If the homework says to combine and simplify, then I am certain they will have something to simplify. In the question so far, all I've done is combine terms to come out with (9a^2+6a+8) as a numerator, and (a+4)(2a) as a denominator. The entire chapter has seen some simplification done at some...

Mark, yes. You guessed correctly at what I meant. (4a)/(a+4) + (a+2)/(2a). It's much easier to write this on paper than it is to do it on a keyboard. LaTeX is brand new to me and I had no idea what it meant until now.

The homework question is to "combine and simplify", and state restrictions. X cannot equal such and such a number. I should be able to cancel some factors in the questions, but I cannot seem to.

Homework Statement (4a/a+4)+(a+2/2a) Homework Equations Just combine and then factor out The Attempt at a Solution It's actually fairly simple, but I'm having difficulty at the end. /multiply each term by opposite denominator 4a(2a)/a+4(2a) + a+2(a+4)/2a(a+4) /combine 4a(2a)+(a+2)(a+4) /...

P=(L*2)+(W*2) Cost =(L*2*10)+(W*2*20) I don't know if this is correct. What is I need to know before I can do this? A process or something?

L*W means Area, or 125000. Length * Width. If I knew the two variables, I'd know the perimeter.

Perimeter would be (L*2)+(W*2)

L*W = area in sq feet, which is 125000. But the variables, $20 and $10 per square foot of fence, don't seem relevant. I don't see how I can get a perimeter from area=125000 and the price per foot of fence. I do appreciate help with this.

I know this question should eventually look like a regular function like the practice questions I've been doing for ages, but I'm failing to see how I get there.

Homework Statement A rectangular region of 125,000 sq ft is fenced off. A type of fencing costing $20 per foot was used along the back and front of the region. A fence costing $10 per foot was used for the other sides. What were the dimensions of the region that minimized the cost of the...

I got it now. That term 3(k+1)-2 that I thought was totally random came from plugging in (k+1) into the k in (3k-2) &*@^&$@^(!

Homework Statement A step in this process of proving Sn: 1+4+7+...+(3n-2) = n(3n-1)/2 confuses me. I hope someone can clarify this for me. I do not require the work done, I need clarification on a step only. Thanks! Homework Equations After assuming n=k, we say Sk: 1+4+7+...+(3k-2) =...

I think it is inaccurate to describe the universe as expanding. It is better to think about space and time (space time) as expanding. Instead, it's possible that the space between celestial bodies is expanding. The rubber band idea, think of a thick rubber band with points on it that is...

A switch only knows about the devices connected to it. (they OWN the devices, so to speak) A switch doesn't know about devices connected to other switches. (computers and printers connected to other switches) Example: If a computer behind switch A wants to print to a printer that is behind...