A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

vera_ewing

  • one year ago

Can someone please explain how to solve this SAT Math question?

  • This Question is Closed
  1. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a, 2a−1, 3a−2, 4a−3, ... For a particular number a, the first term in the sequence above is equal to a, and each term thereafter is 7 greater than the previous term. What is the value of the 16th term in the sequence?

  2. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @sammixboo Can you please explain how to solve this?

  3. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    you are given term is 7 more than the last term that we could go ahead and solve for a knowing that 2a-1 is 7 more than a you have the equation 2a-1=a+7 (solve for a )

  4. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    once we find a then I think things will be more clearer to you

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

    Could I do (2a-1)-a=7 ?

  6. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes so you have 2a-a-1=7 and you can also add 1 on both sides 2a-a=7+1

  7. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Ohhh I see. Can you give me a similar problem to solve please?

  8. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    but we aren't done with that problem

  9. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    we are asked to find the 16th term not a

  10. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    finding a will help us though

  11. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes, so the 16th term would be 113, right?

  12. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yep you are brilliant :)

  13. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    a similar problem... hmm... one sec

  14. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    You have the sequence: 1-a,2-2a,3-3a,4-4a,.... You are given that each term is 5 less than the previous term. Find the 9th term.

  15. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    So (1-a) - 5 = 2 - 2a ?

  16. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    that is the exact equation I have setup :)

  17. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Did you get a=6?

  18. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

  19. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    So the 9th term is -45?

  20. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    totally what I got great job

  21. vera_ewing
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Yay! Thank you so much!! :)

  22. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    np

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.