A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Need more help...If 2x-5y=8 and 7x+6y=17, then 9x+y=

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

    from eq 1 x =(8 + 5y)/2 from eq 2 x = (17-6y)/7

  2. radar
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Use substitution. Equation1 2x-5y=8 Solve for x, 2x=8+5y, then x=4+(5/2)y Equation 2, 7x=6y=17, substitute the newly found x expression like this; 7(4+(5/2)y)+6y=17 this becomes 28+35/2y+6y=17 consolidating similar terms 47y/2=-11 now solve for y

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

    I'm guessing 25

  4. radar
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    After determing y substitute that value for y int equation 1 and solve for x. then solve the 3rd equation

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

    You can add the two equations. It works out well

  6. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now lokis a superhero too ;)

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

    How?

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

    Who pipped me over?

  9. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    easy, I fanned you lol

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

    Oh...thank you ;)

  11. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    been waiting a long time to do that lol ;)

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

    I reciprocated.

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

    I prefer the pink of hero...but not complaining.

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

  15. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i here at500 we get to be villians lol

  16. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    megamind would be an awesome title ;)

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

    I know others answered this question, but I wrote out a solution while you were doing so, and didn't want to waste it :)

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

    I dunno...I wish they'd turn the fan thing off half the time.

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

    I think it's much easier just to add the two equations, since they sum up to: 9x+y=25

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

    rofl, yes!

  21. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    tag!!

  22. 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.