![annetteaudc](/avatars/20957.jpg)
annetteaudc
04.08.2019 •
Mathematics
Arectangular swimming pool with length 50 ft and width 30 ft is surrounded by a sidewalk of uniform width. write a polynomial function that describes the area of the sidewalk in terms of its width
Solved
Show answers
More tips
- O Other What is the oldest joke ever told?...
- F Food and Cooking How to Make Lazy Cabbage Rolls? Simple Steps to a Delicious Dish...
- F Food and Cooking Unusually Delicious Shashlik - Follow the Etiquette of Proper Preparation!...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
Answers on questions: Mathematics
- M Mathematics Which statement represents the expression n÷10-2...
- M Mathematics What is the x and y intercepts of x + y=4?...
- M Mathematics In mr. klein s class, 40% of the students are boys. what decimal represents the portion of the students that are girls...
- M Mathematics Marcy split her income from last week equally between paying her student loans, rent, and savings. she put $650 in savings. how much did marcy earn last week?...
- M Mathematics Write and solve an equation for the situation. eight and one-half years ago, steven was 7 years old. how old is he now? make sure you explain and know your answer. i am confused...
- M Mathematics Kathy can clean 12 house in 10 hrs. if she goes at a steady pace. how many hrs. will it take her to clean 27 houses?...
- M Mathematics Police set up an auto checkpoint at which drivers are stopped and their cars inspected for safety problems. they find that 14 of the 134 cars stopped have at least one safety...
- M Mathematics How do you isolate the variable ‘c’ in the equation f=(9/5)c+32 ?...
- M Mathematics Use the pythagorean theorem to solve this problem. william walks 3.0 miles south and then turns and walks 4.0 miles west. what is his displacement? 5.0 miles, southwest 12.0 miles,...
- M Mathematics Simplify negative 2 and 1 over 6 − negative 7 and 1 over 3. !...
Ответ:
the swimming pool is a rectangle, l=50, w=30
the sidewalk forms a larger rectangle, l=50+2x, width=30+2x
to find the area of the sidewalk, you can subtract the area of larger rectangle from the smaller rectange:
(50+2x)(30+2x)-(50*30)=4x²+160x
Another to do it is the cut sidewalk into 4 portions by extending the vertical sides of the pool to the outer edge of the sidewalk.
the two rectangle on the left and right each has area of (30+2x)*x=2x²+30x
the two horizontal rectangle each has an area: 50x
add them up: 2x²+30x+2x²+30x+50x+50x=4x²+160x
Ответ: