Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Brooke2013 Group Title

Let f(x) = x^2 + 6 and g(x) = x+8/x. Find (g times f)(-7) Choices :) A.) -55/7 B.) 384/7 C.) 295/49 D.) 63/55

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. zepdrix Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Are you sure it's "times", or is it the open circle? Which tells us that it's a composition of functions :D

    • 2 years ago
  2. Brooke2013 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    It's an open circle, I looked at it wrong.

    • 2 years ago
  3. zepdrix Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1353198866293:dw| Ok take a look at this a sec, see if it makes sense or not.. so hmmm to finish this off, we'll need to figure out what f(-7) is.

    • 2 years ago
  4. Brooke2013 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    How do you figure that out ?

    • 2 years ago
  5. zepdrix Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\large f(x)=x^2 + 6\]\[\huge f(-7)=(-7)^2+6\]

    • 2 years ago
  6. Brooke2013 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so the answer to f(-7) is 55

    • 2 years ago
  7. zepdrix Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yah looks good c: So now we plug that value into g!

    • 2 years ago
  8. Brooke2013 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    is the answer B, 384/7

    • 2 years ago
  9. zepdrix Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[f(-7)=55\]\[\huge g(f(-7))=\frac{ f(-7)+8 }{ f(-7) }=\frac{ 55+8 }{ 55 }\]

    • 2 years ago
  10. Brooke2013 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    So the answer is D 63/55 :) Thank you so much

    • 2 years ago
  11. zepdrix Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yay team :D

    • 2 years ago
    • Attachments:

See more questions >>>

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.