A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

I have two questions that I am greatly in need of assistance. I took these in a pretest, and cannot for the life of me understand them. :/ If you could please help me step by step, I would be greatly appreciated. Will metal too! Here they are, simple I know____ The perimeter of a rectangle is 64 units. Can the length x of the rectangle can be 20 units hen its width y is 11 units? Second_ -4(x+1)-3=-3(x-4) For the second one I started off doing: -4(x-1)-3=-3(x-4) -4x-4 -3=-3x-12 +3x +3x -1x-4-3=-12 +4 +4 -1x-3=-12 +3 +3 -1x=-12 -1x -1x

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

    For the first one I did use the formula: p=2l+2w

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

    if the perimeter= 64 units with the width y=11 units then; length=(p/2)width so, x=(p/2)y substituting those values we get x= (64/2)(11) x=?

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

    x = 352 ?

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

    Maybe I was doing it wrong when I was doing the formula: p=2l*2w 64=(2*20)*(2*11) 40 * 22 40*22 = 880

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

    Yeah, I still don't understand how you received 352. I'm sorry. :(

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

    no x=21

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

    I don't disregard that your answer is wrong, I just can't comprehend it. Maybe another way of explaining it?

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

    i made a mistake it shd be p=2(l+w) and we want ''l'' so divide both side by 2 we get p/2=l+w now take away w from both sides wee get (p/2)-w=l

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

    so substituting into that we get (64/2)-11=length

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

    Ah. Okay, now I can see it. I was so focused on trying to use the length that was provided, that it was incorrect. Thank you.

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

    Could you help me on my other question if you have time?

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

    for the second question -4(x+1)-3=-3(x-4)...just making sure its this ..see u wrote (x-1) when u started it..

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

    Ops, yeah its (x+1) sorry typo

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

    The second step would start out like this: -4x+-4-3=-3x-12 I know that you need to get all the variables on one side of the equation, preferable the left side.

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

    ok so -4(x+1)-3=-3(x-4) we can start by multiplying out parentheses so -4x-4-3=-3x+12 simplify -4x-7=-3x+12 add (3x) and (7) to boh sides we get -4x+3x=12+7 simplify -x=19 then divide by -1 x=-19

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

    Okay: You would finally have -1x-7=12 then adding the seven to both sides of the equation. Finally you would have -1x=19 divide -1x by both sides and get x = -19 Ah, I see the mistake on my part, but thank you so much for your time.

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

    Have a nice night, thank you again! @ LynFran I made sure I gave you a metal.

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

    ok... welcome ...

  19. 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.