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

asalia1

4pencils and five pens costs $2.00 Three pencils and four pens cost $1.58 find the cost of a pencil and the cost of a pen

  • 3 years ago
  • 3 years ago

  • This Question is Closed
  1. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    L = lead P = pen 4L + 5P = 2 3L +4P = 1.58

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

    asaila1 use simultaneous equations

    • 3 years ago
  3. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    L = 2/4 -5P/4

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

    you should get pen = $0.24 and pencil =$0.20

    • 3 years ago
  5. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    we could multiply the top by 3 and the bottom by -4;)

    • 3 years ago
  6. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    12L +15P = 6 -12L -16P = -6.32 --------------- 0 -P = -.32 P = .32 ???

    • 3 years ago
  7. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    L = .10? lets see :) 3(.1) +4(.32) = 1.58 .3 + 1.28 = 1.58 it works

    • 3 years ago
  8. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    pencil = .10 pen = .32

    • 3 years ago
  9. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    vit; how you get yours?

    • 3 years ago
  10. virtus
    Best Response
    You've already chosen the best response.
    Medals 1

    let p = pencil and x = pens so 4p + 5x =$2.00---- 1 and 3p +4x =$1.58---- 2 make p the subject in equation 1: p = (2-5x)/ 4 sub p into equation 2 3((2-5x)/ 4) + 4x =$1.58 ((6-15x)/4)+4x =$1.58 x+6 = $6.24 x= $0.24 sub x back into p p = (2-5($0.24))/4 p = $0.20

    • 3 years ago
  11. virtus
    Best Response
    You've already chosen the best response.
    Medals 1

    ooops i am so sorry amistre64 you are correct i made a slight error in my calculations in my working out on paper i wrote $1.56 MY APOLOGIES I AM SO SORRY!

    • 3 years ago
  12. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    virtus; its ok :) happens to me ALLLL the time ;) its always good to have another set of eyes :)

    • 3 years ago
  13. virtus
    Best Response
    You've already chosen the best response.
    Medals 1

    =)

    • 3 years 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.