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

BrittanyFrench Group Title

Can some explain to be on what to do with a question like this: Suppose a movie theater has 42 rows of seats and there are 29 seats in the first row. Each row after the first has 2 more seats than the row before it. How many seats are in the theater?

  • one year ago
  • one year ago

  • This Question is Closed
  1. BrittanyFrench Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I know it's using gemoetric or arithmetic stuff

    • one year ago
  2. Saikam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok. so can u tell me how many seats in the second row?

    • one year ago
  3. BrittanyFrench Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    31 right?

    • one year ago
  4. itsmylife Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    first row has 29 common difference is d=2, your a=29 , d=2 therefore in 42 rows there are total of \[Sn=\frac{ n }{ 2 }(2a+(n-1)d)=\frac{ 42 }{ 2 }(2*29+(42-1)2)\] you can calculate now

    • one year ago
  5. itsmylife Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    it should be 2940 seats

    • one year ago
  6. Saikam Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yea. 29 + 2 and in the third its 29 + 2 + 2 = 29+4 in the fourth, it is 29 + 6 and so on... so the nth row would contain 29 + (n-1)*2 This is the general term of an A.P. and you are asked to find the sum of the first 42 terms.

    • one year ago
  7. BrittanyFrench Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Dang that's alot of seats,and yeah I calculated that! Thank you..

    • one year 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.