A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Joel bought 8 books. Some books cost $13 each and some cost $17 each. In all, he spent $128. Which system of linear equations represents the given situation? A. 4x + 4y = 8 and 17x + 13y = 128 B. x + y = 13 and x + 17y = 128 C. x + y = 17 and 13x + y = 128 D. x + y= 8 and 13x + 17y = 128

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, we know A isn't right because it doesn't make sense with the question

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

    I want us to take a look at D.

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

    Some books cost 13 dollars, so it could be 13x . Some books cost 17 dollars also. so it could be 13x + 17y = 128. some of his books are from x and some are y. Since we don't know how many books are from x and y, you would have to input x + y = 8

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Make sense?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So it's D ? Because it equals out and because we don't know how many were from each it had to be x + y = 8 ?

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

    Yes!

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

    Thank you ^^

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You're welcome o^-^o do you need anymore help?

  9. 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.