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

Megichu Group Title

the front row of a stadium has 25 seats. each of the other rows has two more seats than the row in front of it. how many seats are there altogether in the first 20 rows?

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. timo86m Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    25+(x*2)

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

    oh wow, thanks for the quick response!

    • 2 years ago
  3. timo86m Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    not finished

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

    @timo86m :can u explain how did u get that ?

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

    im studying for the SATs and am struggling greatly with permutations

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

    sequences*

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

    @Megichu : U know A.Sequence basics ?

    • 2 years ago
  8. timo86m Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    2+2+2+2...=19*2 =38 25+(19*25)+38

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

    i understand what the basic formula is, but interpreting the problem at times can be difficult

    • 2 years ago
  10. timo86m Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1342034133001:dw|

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

    Front row=a=first term=25. Each of the other rows has two more seats than the row in front of it ,thats mean that the difference between every two rows is 2 ,So d=2 ========================= a=25 ,d=2 Sum law : Sn=n/2[2a+(n-1)d] where n = number of terms .. now lets fill up the rule S20=20/2 [2*25+(20-1)2]=880 seats . ------------------------------------------------------------- Make sense ?

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

    perfect. thank you so much for the great response! and yes, that makes much more sense

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

    Great,Inform me when you need help :)

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

    not sure why i have such a difficult time with these problems (considering that their are 2 main formulas XD) but i really appreciate the help

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

    also, this site is great. i look forward to using it more often!

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

    Just keep solving examples ,Then it will get much easier :)

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

    definitely doing a lot of that right now! haha im taking an SAT course right now and have a packet to practice all of these lovely problems :3

    • 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.