NationStates Jolt Archive

I can't get this one review question, for some reason.

y=c/(a+bx)

Solve for x.

I multiplied by (a+bx), and then screwed around with it for a while, before giving up and eating dinner.

I searched google and got this web site: http://www.mathpages.com/home/kmath220/kmath220.htm


does that help? I'm really not good at math, failed it two or three times in high school

I can't get this one review question, for some reason.

y=c/(a+bx)

Solve for x.

I multiplied by (a+bx), and then screwed around with it for a while, before giving up and eating dinner.

first flip both sides:

1/y = (a+bx)/c

multiply each side by c:

c/y = a+bx

subtract a from each side:
c/y - a = bx

divide by b:

(c/y - a)/b = x or you can rewrite it as (c -ay)/yb

multiply both sides by (a+bx), subtract ay from both sides, divide both sides by by.

y=c/(a+bx)
y(a+bx)=c
a+bx=c/y
bx=(c/y)-a
x=((c/y)-a)/b)

I think that's correct, IIRC my maths.

I searched google and got this web site: http://www.mathpages.com/home/kmath220/kmath220.htm


does that help? I'm really not good at math, failed it two or three times in high school


My school doesn't offer math 12, so now, 2 weeks into the school year, I'm starting math 12 at a school within walking distance. The math teacher was kind of like "Hi, I'm your teacher, here, have these 391 questions you missed. I'm available to help you during these times, when you are at your regular school." I'm thinking that if that's the answer, then I probably missed it during the first 2 weeks and should skip half of Biology to get help. I'm down to about 330 questions now, and they're all about circles and parabolas, which are what I'm terrible at.

I can't get this one review question, for some reason.

y=c/(a+bx)

Solve for x.

I multiplied by (a+bx), and then screwed around with it for a while, before giving up and eating dinner.
y(a+bx)=c

a+bx=c/y

c/y-a=bx

((c/y)-a)/b=x

which I believe comes out to

c/(yb) - a/b=x

I am a high school math teacher, if you need help you can IM me at KPhysicsGeek and I would be happy to answer any questions

I am a high school math teacher, if you need help you can IM me at KPhysicsGeek and I would be happy to answer any questions

Is that AIM or Yahoo?

Just wait until you get into the stuff with numbers.

Aim

Just wait until you get into the stuff with numbers.

*grin* Nah, numbers are easy. They have concrete answers. You know where you stand with numbers. But letters, ooh, they're tricky buggers. They're slippery and slimy and they squirm just out of your grasp.

*grin* Nah, numbers are easy. They have concrete answers. You know where you stand with numbers. But letters, ooh, they're tricky buggers. They're slippery and slimy and they squirm just out of your grasp.

Greek ones are the worst. Except pi.

I can't get this one review question, for some reason.

y=c/(a+bx)

Solve for x.

I multiplied by (a+bx), and then screwed around with it for a while, before giving up and eating dinner.
I think the "trick" that they are trying to learn ya' here is step 1a & 1b below.

1) y=c/(a+bx)
1a) z = (a+bx)
1b) y=c/z
2) yz=c
3) z=c/y
4) a+bx=c/y
5) bx = (c/y) - a
6) x = ((c/y) - a) / b
7) $Profit$
:headbang:

no clue, wanna help with mine?

2x(3x^2/6x^5)


now simplify. I'm totally lost on this one.

no clue, wanna help with mine?

2x(3x^2/6x^5)


now simplify. I'm totally lost on this one.

The underline's just to show its also divided, right?

2x(3x^2/6x^5)=
6x^3/6x^5=
1/x^2=
x^-2

no clue, wanna help with mine?

2x(3x^2/6x^5)

now simplify. I'm totally lost on this one.
WARNING! This is assuming I am remembering the rules for exponents, among other things...

1) 2x ( 3x^2 / 6x^5 )
2) 2x (3 ( x^2 / 2x^5 ))
3) 2x (3 ( x^2 * 2x^-5 ))
4) 2x (3 ( 2x^-4))
5) 2x (6x^-4)
6) 2 (6x^-3)
7) 12x^-3
8) 1/ 12x^3

I have a bad feeling on this one. :confused:

After edit:
Or maybe -
1) 2x ( 3x^2 / 6x^5 )
2) 2x ( 1x^2 / 2x^5 )
3) 2x ( 1 / 2x^3 )
4) 2x / 2x ^ 3
5) x / x ^ 3
6) 1 / x ^2
Errmmmm.. :confused:

right. so i divide the 6's, but subtract the exponents? that almost makes sense. almost. anyway, thanks, no one else i asked got it.

vegas-rex had it. i had the answer, but not how to get there. the wyn starcluster was a little off. sry. :)

Ha....

math n00bs, nothing fun happens in math until trig. It gets even better in calc and up

vegas-rex had it. i had the answer, but not how to get there. the wyn starcluster was a little off. sry. :)
I bow to the god like abilities of vegas-rex.
:cool:

Ha....

math n00bs, nothing fun happens in math until trig. It gets even better in calc and up

Geometry's good if you like proofs, but I found them irritating. Stuff after calculus stops being fun once you have to walk to a nearby university before school to do it.

Geometry's good if you like proofs, but I found them irritating. Stuff after calculus stops being fun once you have to walk to a nearby university before school to do it.

So you're doing university level math while in highschool? Good for you.

Get a TI-89 calculator. It solves for variables. Tuns uh phun. If you can't beat 'em, cheat 'em.

Get a TI-89 calculator. It solves for variables. Tuns uh phun. If you can't beat 'em, cheat 'em.

The only problem with TI-89s is that they aren't allowed on a bunch of major tests, so you can't use it when you need a good calculator the most.

no clue, wanna help with mine?

2x(3x^2/6x^5)


now simplify. I'm totally lost on this one.

2x(3x^2/6x^5) <---starting problem
2x{3[(x)(x)]/6[(x)(x)(x)(x)(x)]}<---turn exponents into multiplication
2x{1/3[(x)(x)(x)]}<---simplify by removing the x's and dividing 3 by 6
2x/3[(x)(x)(x)]<---multiply...
2/3x^2<---simplifing...
I think that's about right...

Greek ones are the worst. Except pi.What are you talking about? You can't even hold a decent conversation with Pi- it's totally irrational.

math n00bs, nothing fun happens in math until trig. It gets even better in calc and upWait 'til you get to a proofs class- then you'll realize that you haven't learned anything since Geometry. Granted, if you read the book and go through the proofs in there, you realize that it's all defined in terms you already know after there- no new stuff. I hated it, but I have to admit that Geometry's where all the fun really is.

The underline's just to show its also divided, right?

2x(3x^2/6x^5)=
6x^3/6x^5=
1/x^2=
x^-2
this looks right to me, with powers with say x^3*x^4 you add them so its x^7, if they are divided ie x^8/x^3 you subtract them so you get x^5.
you could also do it
2x(3x^2/6x^5)=
2x(3/6)(x^2/x^5)=
2x*1/2*1/x^3=
1/x^2