A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

By decreasing each side of a rectangle by 1 unit, the area decreased from 60 square feet to 44 square feet. Find the perfect decrease in area.

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

    L*W = 60 (L-1)(W-1) = 44 --> LW -L -W +1 = 44 By substitution L+W = 17 L = 17 - W W(17-W) = 60 W^2 -17W +60 = 0 (W-12)(W-5) = 0 W = 5 or 12 Dimensions of original rectangle are 12ft by 5ft

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

    But I don't see how that has to do with the percent decrease of the area of the two rectangles?

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

    This one I'm not completely sure about, but here goes. Since you start out with 60 sq ft and end with 44 sq ft, you want to find out the percent lost from 60. Start out with how much was lost: 60 - 44 = 16 Now 16 sq ft was the amount lost from 60 sq ft. What percentage is 16 from 60? 16/60 = .2666666666666666666666... ...which rounds to about .2667 To get the percentage, multiply .2667 by 100% .2667 x 100% = 26.67% Percentages definitely were not my strong suit in math, so take this with a grain of salt.

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

    That was right! thank you!

  5. 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.