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Determine the value of f(6), f(3/2), f(2c) and f(c+1), then simplify as much as possible
Question :
f(x) = 3x^2  4x
 one year ago
 one year ago
Determine the value of f(6), f(3/2), f(2c) and f(c+1), then simplify as much as possible Question : f(x) = 3x^2  4x
 one year ago
 one year ago

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AylinBest ResponseYou've already chosen the best response.1
Well, in the first two, just take the appropriate number and plug it in where x is. Then simplify it down. For the third one (2c) replace x with 2c, then see what you get. Same for the fourth one. The first two are plug'n'chug, but if you need help with the second two I'll stick around.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
the second two, just plug it in to every x in the problem ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Mhm. So f(2c) would like\[f(2c)=3 \times (2c)^{2}4 \times (2c)\]
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
kinda dumb question but for the first one f(6) i did 6=3(6)^24(6) 6=108+24 6=132 then at this step do you add the 6 over or minus the 132 over ?? lol
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
it usually easier if one size has a (x)
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, the left side is f(6) not 6. So when you get to f(6)=132, you are finished with that part.
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Since you've found the value in the range (132) that corresponds to the value of 6 in the domain.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
the second one i found is 3/4 hope its right
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
the third one i got: f(2c) = 4c
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
and do you divide the 2c over ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, with these problems you only need to simplify the right side, don't worry about the left side at all. In the third and fourth ones your answer will be in terms of c though.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
so is my answer for the third one okay ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, no.\[(2c)^{2}=4c^{2}\]and there is nothing in there to cancel it, so you should have a c^2 term.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
how did you get 2c^2 on the left side ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
\[f(2c)=3(2c)^{2}4(2c)\]and\[(2c)^{2}=4c^{2}\]so\[f(2c)=3 \times 4c^{2}4(2c)\]
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
oh so you can't multiply the term 4 with 2c ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
You can, but I was leaving it for you to do. :P
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
at first i thought u can make (2c)^2 = 4c and just X 3 = 12c
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Pretty close, just forgot the ^2 part of it. :P
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
but why ? :O isn't it already been done on the 2c^2 ?why ^2 another
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well\[(2c)^{2}\]is the same thing as\[2c \times 2c\]Does that make it more clear?
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
and 4c x 3 = 12c lol ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
\[2c \times 2c = 4c^{2}\]
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
omg...my mind is somewhere else today....sorry
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Mine is too, don't worry.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
so once i got f(2c) = 12c^2  8c then what can i do next?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, at this point all of the same powers of c are together, so you're done.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
what do you mean by "same powers of c are together" ? :d
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, there's only one c^2 term and only one c term. You can't combine the c^2 and the c terms, so there is nothing left to do.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
the fourth one im stuck completely :D
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, what is\[(c+1)^{2}\]?
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
c^2+2c+1 and i think u can factor it more right ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, we don't want to factor it right now. So now\[f(c+1)=3 \times (c^{2}+2c+1)4 \times (c+1)\]Can you finish it from there?
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
i think it is : f(c+1)=3c^2 + 2c 1
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
your really good in math :D genius maybe?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Not really, I just want to teach math.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
btw are you in college?
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
oh ! so your a teacher :D
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
wow! how lucky i am :D
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Not yet. I'm a senior at RPI.
 one year ago

AylinBest ResponseYou've already chosen the best response.1
But next year I hope to be a teacher.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
so your graduating next year ?
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
how many years did you spend in RPI ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
The end of this year will make three years.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
that's really quick wow
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
is this it ? "Rensselaer Polytechnic Institute" ?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Yeah. Not really very fast though; I spent two years at another school first.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
I see, still not bad. I had a friend who spends 3 years at community college and transfer
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
what's the GPA for acceptance in RPI?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
It was a community college that I came from, actually. From another college or from high school?
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
yeah, everybody is doing community college first now aday, cuz it's so much cheaper :D
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Minimum is 3.0 Higher is better of course, but they also like it if you've been taking mostly science and math courses (or engineering if that's your major choice) if possible.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
well thanks so much for talking with me Aylin. I gotta get to dinner now :D
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Like if you took a lot of math/science courses and made mostly Bs, it would look better than if you had made As taking mostly things like Art or Chorus or History
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
anything with science and math is better...and it's the subjects that im most terrible at. WOW..
 one year ago

AylinBest ResponseYou've already chosen the best response.1
Well, the other thing is that RPI is about $60000 a year right now, so...
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
your kidding me? no way
 one year ago

AylinBest ResponseYou've already chosen the best response.1
http://admissions.rpi.edu/aid/index.html
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
so how much for 1 semester of full time?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
About half, but it depends on what your dining plan is, where you live, ect.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
omg so much debts...well but it's COLLEGE that we're talking about here so no suprise.. :
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
one time I read that article about this college couples graduated with over 200k debts scared the hell out of me :
 one year ago

AylinBest ResponseYou've already chosen the best response.1
I'm gonna have about $45K.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
did they tell you about the rate? or how much you have to pay back once your graduated ? I mean monthly?
 one year ago

AylinBest ResponseYou've already chosen the best response.1
At some point probably. I don't remember what it is right now.
 one year ago

Shido88Best ResponseYou've already chosen the best response.0
oh i see, well i hope you can pay back all the debts without too much trouble :
 one year ago
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