1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alinara [238K]
2 years ago
10

9. A rectangular garden has a length that is 3 feet longer than its width. Let w represent the width of the garden, in feet. The

entire garden is surrounded by a 2-foot-wide cement walkway. What does the algebraic expression ( w+4)(w + 7) represent in this context?
A the area of the garden only
B. the total area of the garden and walkway
C. the perimeter of the garden only
D. the perimeter of the walkway only​
Mathematics
1 answer:
inysia [295]2 years ago
7 0

Answer:

B

Step-by-step explanation:

w=width

l=w+3

(w+4)=width+walkway(both sides)

(w+7)=length+walkway(both sides)

You might be interested in
A. 40, B.80, C.120, D. 160, or E. 400
Rudik [331]
B: 80

All the sides add up to 20 so adding all four sides make 80
6 0
2 years ago
Read 2 more answers
During the 7th examination of the Offspring cohort in the Framingham Heart Study, there were 1219 participants being treated for
AlexFokin [52]

Answer:

95% confidence interval for the proportion of the population which are on treatment is [0.3293 , 0.3607].

Step-by-step explanation:

We are given that during the 7th examination of the Offspring cohort in the Framing ham Heart Study, there were 1219 participants being treated for hypertension and 2,313 who were not on treatment.

The sample proportion is :  \hat p = x/n = 1219/3532 = 0.345

Firstly, the pivotal quantity for 95% confidence interval for the proportion of the population is given by;

      P.Q. = \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion = 0.345

           n = sample of participants = 3532

           p = population proportion

<em>Here for constructing 95% confidence interval we have used One-sample z proportion statistics.</em>

So, 95% confidence interval for the population​ proportion, p is ;

P(-1.96 < N(0,1) < 1.96) = 0.95  {As the critical value of z at 2.5% level of

                                                         significance are -1.96 & 1.96}

P(-1.96 < \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } < 1.96) = 0.95

P( -1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } < {\hat p-p} < 1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ) = 0.95

P( \hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } < p < \hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ) = 0.95

<u>95% confidence interval for p</u>= [\hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } , \hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }]

    = [ 0.345-1.96 \times {\sqrt{\frac{0.345(1-0.345)}{3532} } } , 0.345+1.96 \times {\sqrt{\frac{0.345(1-0.345)}{3532} } } ]

    = [0.3293 , 0.3607]

Hence, 95% confidence interval for the proportion of the population which are on treatment is [0.3293 , 0.3607].

6 0
3 years ago
The cross country coach later determine that the length of the football field is 120 yards. All students must run five laps. Usi
Sedaia [141]

Answer:

25.2

Step-by-step explanation:

3 0
2 years ago
Three to the power of three minus seven plus ten
BARSIC [14]

Answer:

30

Step-by-step explanation:

You’re correct

6 0
3 years ago
Read 2 more answers
15 trading cards he wants to give to 5 friends. Each friend gets same number of trading cards
earnstyle [38]

Answer:

Each friend gets 3 cards

Step-by-step explanation:

Divide 15 by 5 since he is splitting 15 cards with 5 friends.

:D

6 0
3 years ago
Other questions:
  • Suppose an airport metal detector catches a person with metal 99% of the time. That is, it misses detecting a person with metal
    8·1 answer
  • Tan80+tan70/1-tan80tan70
    11·1 answer
  • Best explained and correct answer gets brainliest!!
    9·1 answer
  • Find the common ratio of the geometric sequence: 12.5,−62.5,312.5,−1562.5,… A. 5 B. -5 C. −15 D. 15
    11·1 answer
  • 8. How do you find area of a triangle? *<br> (10 Points)
    8·1 answer
  • 3 5/6+4 3/6=?? Can someone help me
    7·2 answers
  • madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later she she crosses anot
    10·2 answers
  • If 20% discount on an item amounts to Rs 160, find the marked price of the item
    12·1 answer
  • What is the slope and b value of this graph?​
    14·1 answer
  • How many times does 9 go into 12?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!