A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

In 15 years, Maya will be twice as old as David is now. In 15 years, David will be as old as Maya will be 10 years from now. How old are Maya and David now?

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

    m+15 = 2d d+15= m + 10 d=20, m = 25

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

    wait how do i work the problem

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

    well the way i see it is that M+15 = 2d D+15M=10 tho

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

    so the way you would work it out is i belive add i am not sure hold on

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

    try what we did last time substitution m+15 = 2d so then m = 2d - 15 so in the second equation d + 15 = m + 10 use m= 2d -15 d+ 15 = (2d-15) + 10 you get d + 15 = 2d - 5 solve for d you get d = 20 then go back to m + 15 = 2d since d = 20 you get m + 15 = 2(20) so then m = 2(20) - 15 = 25

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

    ok thank you so much

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

    ok hold on he might be right but i belive there is another way an eser way

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

    there is another way but substitution is usually best if they cant get it...its a little longer but it can help them...you can use elimination and it would work just as well

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

    it works when they have trouble setting up or "seeing" the problem

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

    ik that but i am talking about anther way u have never did it then if so you would no

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

    dude its a system of equations......

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

    plus she is probably in algebra 1 or something so its elementary............you have to use methods that they can use..........you cant just pull out tricks from upper level math and expect them to reproduce the result.

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

    ok your right

  14. 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.