A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
f(x)=4x+3
helpp
anonymous
 one year ago
f(x)=4x+3 helpp

This Question is Closed

whovianchick
 one year ago
Best ResponseYou've already chosen the best response.0What are we helping to do?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0figure out f(x)=4x+3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you walk me through it

whovianchick
 one year ago
Best ResponseYou've already chosen the best response.0What do you mean figure it out? What are the instructions on the problem?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0f(x) = 4x + 3 is a statement, not a question. What are you trying to do with the function?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0get like an answer at the end what would i tell my teacher

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what were you asked? there has to be some instructions

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0did they give you any other information?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0like, did they give you an x value?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, now we're getting somewhere. Are you supposed to evaluate it at a specific value of x?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, so you would substitute 2 for x f(x) = 4x + 3 f(2) = 4(2) + 3 then simplify that

whovianchick
 one year ago
Best ResponseYou've already chosen the best response.0Don't multiply f and 2 though, that's basically y. It stays f(2), or function of 2.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can i ask a couple more

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok what are the instructions for this one?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i have to combine them but I'm confused

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, there are lots of different ways to combine functions. It really depends on what you're asked for. Do you have a specific combination, or do you just want me to show you some

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you show me some

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok let's start with the basic 4 Adding \(f(x) + g(x) = 5x + 3 + x + 4\) \(= 6x + 7\) Subtracting \(f(x)  g(x) = 5x + 3  (x + 4)\) \(=5x+3x4\) \(=4x1\) \(g(x)  f(x) = x + 4(5x+3)\) \(=x+45x3\) =\(4x+1\) Multiplying \(f(x)\cdot g(x)=(5x+3)(x+4)\) \(=5x^2+20x+3x+12\) \(=5x^2+23x+12\) Dividing \[\frac{ f(x) }{ g(x) }=\frac{ 5x+3 }{ x+4 }\] \[\frac{ g(x) }{ f(x) }=\frac{ x+4 }{ 5x+3 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Then you can get more complex with something like \(2f(x)3g(x)=2(5x+3)3(x+4)\) =\(10x+63x12\) =\(7x6\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You can also compose functions, which is basically putting one inside the other. To find f(g(x)) replace the x in f(x) with the function from g(x). \(f(g(x))=5(x+4)+3\) \(=5x+20+3\) \(=5x+23\) To find g(f(x)), do the opposite and replace the x in g(x) with f(x) \(g(f(x))=(5x+3)+4\) \(=5x+7\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok can you walk me through on Subtracting f(x)−g(x)=5x+3−(x+4) =5x+3−x−4 =4x−1 g(x)−f(x)=x+4−(5x+3) =x+4−5x−3 =−4x+1 how'd you get that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0from the first line to the second you have to distribute. (x + 4) = x  4 for the first one and (5x + 3) = 5x  3 then you combine like terms Is that what you meant?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yea thank you and what about the others sorry I'm asking so much its just that i need to pass this

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no problem. for multiplying you usually have to use FOIL or do some distribution. dividing is just writing one on top of the other like a fraction

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Most of this is really knowing how to apply the distributive property and combine like terms
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.