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

xokatexo

1. Vicki has $2.80 in quarters and dimes. The number of dimes is 7 less than the number of quarters. Find the number she has of each kind. 2. A purse containing $3.20 in quarters and dimes has, in all, 20 coins. Find the number of each kind of coin.

  • one year ago
  • one year ago

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

    can you show the substitution work?

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

    |dw:1348685007820:dw| try to solve for Q from here :)

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

    q=-.56

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

    thats not right....

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

    hmm lets see

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

    Q(Q-7)=2.80 2Q-7Q=2.80 -5Q=2.80 ---- ------ -5 -5 Q=-.56

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

    @zepdrix

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

    woops don't get confused by my brackets :C Q+(Q-7) = Q+Q-7

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

    wait what?

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

    oh woops i messed up from the start T.T oh goodness. im sorry bout that.. need to fix that..

    • one year ago
  11. kropot72
    Best Response
    You've already chosen the best response.
    Medals 1

    The two equations are as follows: 25Q + 10d = 280 d = Q - 7

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

    yah what kropot said, sorry bout that :C

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

    k got it THANKS @kropot72

    • one year ago
  14. kropot72
    Best Response
    You've already chosen the best response.
    Medals 1

    You're welcome :)

    • one year 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.