A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Tina lost 3 pounds on the first week of her diet. She gained a pound on the second week, and then lost 2 pounds a week during every week afterwards. She has been dieting for a total of 13 weeks. How many pounds has Tina lost in all? A. 26 pounds B. 20 pounds C. 24 pounds D. 22 pounds

  • This Question is Closed
  1. kittiwitti1
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    lost 3 pounds: -3 gained 1 pound: +1 lost 2 pounds every week after: 2n (n is the consecutive weeks) Thirteen weeks minus two weeks is eleven weeks. So n is 11. Equation:\[-3+1-2n\rightarrow-3+1-2(11)=?\]

  2. kittiwitti1
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Are you still lost?

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

    yup

  4. kittiwitti1
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Where are you confused?

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

    i suck at math so all of it and i doing at home school so i don't really have a teacher to help me or teach me how to do any of this

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

    im gonna guess 24

  7. kittiwitti1
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    1st week: lost 3 pounds. Lost means subtract, -3. 2nd week. gained 1 pound. Gain means add, +1 the other weeks: lost 2 pounds each. Lost means subtract. Since the first two weeks are of a different weight gain/loss, we subtract the first two weeks from the total 13 weeks and get 11 weeks, 13-2=11 weeks. So basically\[\text{week one}-3,\text{week two}+1\]\[\text{the remaining weeks}13-2=11\text{ weeks}\rightarrow-2n\text{with n being # of weeks}\]\[\text{since n is 11, }-2n=-2(11)\rightarrow\text{add it all up and }-3+1-2(11)\]

  8. kittiwitti1
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Maybe my explanation was confusing. But the equation you get to find the answer is -3+1-2(11)

  9. kittiwitti1
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[-3+1-2(11)=-3+1-22=-25+1=-24\]You got it right, except it was negative. :]

  10. 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.