Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

elizabethann509

  • 2 years ago

Could someone help me figure out how to solve the rest of this? I need to find fog.. This is the initial equation: f(x)=x+7 and g(x)=3x+2 This is as far as I've gotten: fog = f(g(x)) = x(3x - 2)+7 Have I done this right so far? What do I do next? I have notes on this but I don't really understand how to do the next steps.

  • This Question is Closed
  1. elizabethann509
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I think I may have just figured it out....

  2. zepdrix
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    f composed of g.. hmm i think you're very close :) f(g(x)) So if g(x)=3x+2 then f(g(x))=f(3x+2) If f( ) = ( ) + 7 fill in the blank! :)

  3. elizabethann509
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Here's what I did: 1. f(x)=x+7 and g(x)=3x+2 2. fog=f(g(x))=x(3x-2)+7 3. fog=3x+2+7 (I switched from negative to positive/plus to minus) 4. Subtract 2 from itself and from 7 5. fog = 3x+5 Correct?

  4. NoelGreco
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    f(3x+2) means that you replace the x in function f with 3x+2

  5. NoelGreco
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Also, in step 2 you've got 3x MINUS 2, not 3x+2

  6. zepdrix
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    f(x)= (x) + 7 f(x+y)= (x+y) + 7 f(potato)= (potato) + 7 whatever is inside of f, that's what you plug in for your original x. f(3x+2)= (3x+2) + 7 Does that make sense? :)

  7. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find 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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.