That homework help thread.

[Hannah]

Pretty self-explanatory, eh? Oodles of smart people who are all smart in different areas means one thing; a kick ass homework help forum. So, have at it.

[Hannah]

Thanks! That helped a lot.

[Xuut]

So um, anyone know anything about writing position papers for model UN?

Help would be epic.

[Contradiction]

Anyone good at graphing rational expressions (i.e. asymptotes)?

[Hannah]

Asymptotes are when a curve approaches a straight vertical/horizontal line, right? What about them?

[Contradiction]

Yep.

The equation is thus: (2x^2 - 3x - 1) / (x^2 - 9).

 

I figured out the intercepts and the asymptotes, but I dunno how to graph the lines themselves. This particular equation, that is. I'm usually fine at it...

[Hannah]

Well you can use the difference of squares formula to see that the bottom can be factored to get (x+3)(x-3)

I don't know about the top... But does that help?

[Contradiction]

Not really, since I got that figured out. But thanks. x3

[Hannah]

Ah. Sorry I couldn't be more help. :/

For any kind of graphing problem, there's a downloadable program called GeoGebra which is the bomb. It's basically a really awesome, easy to understand graphing calculator. I suggest getting it if you're having trouble.

[EndOfTheEarth]

Plot a few points on the graph to figure out which sides of the asymptotes the graph is on, and then draw generalized curves that fit within those asymptotes. If you get the intercepts and asymptotes correct, then most teachers aren't picky about the actual graph.

[Xuut]

Question from my test that I had no clue how to do and therefore almost made me cry in Math because I didn't know how to do it at all, usually I have a very vague idea. Interestingly enough, it was a type of question I missed the one day when I wasn't in Math. WTF indeed.

The question:

A guitar maker sells 45 used guitars for $50. He plans to raise his price for a higher profit. He figures that for every $2 raise he will lose 1 customer a month.

Create an equation that shows the profit of the guitar where X represents the change in cost.

---

The rest of the questions ( a total of 5) were based off this graph (which I didn't know how to make) so it kind of made me want to kill something since I couldn't even get pity points.

[RantingSidekick]

I love these kinds of equations!

Let's see if I can remember how to do them...(Algebra II was two years ago..)

 

I'm going to assume that the 45 guitars are 45 customers.

(50+2x) / (45-x)

^Price (with change as x) DIVIDED BY Customers (with change as x)

 

...Maybe... o.O

[Xuut]

But... But... We did quadratic equations.... We don't do division. I know the graph HAS to be a parabola. That's not a parabola. Because the vertex would be the point where he makes the most money and then after the vertex then he looses money. 

 

asdfghjkl Algebra II? Frig. Why am I so behind the Americans if we have the same schooling? Also why would you love these questions? They hurt my poor brain.