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

katlin95 Group Title

Which of the following is the vertex of the function? y = x2 - 14x + 13 A. (1, 0) B. (3, -20) C. (5, -32) D. (7, -36)

  • 2 years ago
  • 2 years ago

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

    You need to complete the square

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

    Do you know how to do that?

    • 2 years ago
  3. katlin95 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    kinda

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

    \[y=(x^2-14x)+14\] Then I take half the x coefficient and square it. Then I add and subtract that number \[y=(x^2-14x+49-49)+14\] Then I bring the minus number out of the brackets \[y=(x^2-14x+49)-49+14\] Now, what we have done is forced the brackets to be a perfect square. So we can factor \[y=(x-7)^2-49+14\] And just simplify \[y=(x-7)^2-35\] Now that it is in vertex form, we can see that the vertex is (7,-35)

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

    Ok?

    • 2 years ago
  6. katlin95 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    wow yes!

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

    Just remember...that in the step where we bring the negative 49 out of the brackets, if there is a number in front of the brackets, you would have had to multiply the -49 by that number when you bring it out.

    • 2 years ago
  8. katlin95 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    okay!:)

    • 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.