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
creativ13 [48]
3 years ago
7

a rectangle has a length of 12 and an unknown width x. write expression for the permeter and area of rectangle

Mathematics
1 answer:
svet-max [94.6K]3 years ago
7 0
If the width is literally x then:
12(2)+2(x)
24+2x is the perimeter

12(x)
12x is the area
You might be interested in
A pencil box has dimensions of: 6 1/2 inches, 3 1/2 inches, and 1 1/2 inches, respectively. Approximately, how many cubes with s
Inessa05 [86]
It would be approximately 50 cubes
3 0
3 years ago
Help me please o(* ̄▽ ̄*)ブ(づ ̄ 3 ̄)づ
evablogger [386]

Answer:

a) 24

b) Bowtown and Dovebury

c) 57

3 0
3 years ago
A survey is being conducted to decide on how much time people spend watching sports on television. Tell whether the given sample
Naddika [18.5K]

Sampling bias occurs when some members of a population are systematically more likely to be selected in a sample than others. From this definition,

For sample 1, Every fifth person who enters Little Casesars Arena for a Red Wings game. This is not biased because no person is more likely to be selected than another

For sample 2, Every tenth name in the phone. This is also not biased

because no person is more likely to be selected than another

4 0
3 years ago
Why is division not commutative
Kamila [148]
Division CANNOT be commutative, here is why

lets say the problem is 24÷4

it is obviously  6

but when you flip 24÷4, you get 4÷24

and... 4÷24 is 0.16666666

6 and 0.1666 is totally different :p
3 0
3 years ago
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 335335 babies were​ born
strojnjashka [21]

Answer:

The 99​% confidence interval estimate of the percentage of girls born is (74.37%, 85.63%).

Usually, 50% of the babies are girls. This confidence interval gives values considerably higher than that, so the method to increase the probability of conceiving a girl appears to be very effective.

Step-by-step explanation:

Confidence Interval for the proportion:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 335, \pi = \frac{268}{335} = 0.8

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 - 2.575\sqrt{\frac{0.8*0.2}{335}} = 0.7437

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 + 2.575\sqrt{\frac{0.8*0.2}{335}} = 0.8563

For the percentage:

Multiplying the proportions by 100.

The 99​% confidence interval estimate of the percentage of girls born is (74.37%, 85.63%).

Usually, 50% of the babies are girls. This confidence interval gives values considerably higher than that, so the method to increase the probability of conceiving a girl appears to be very effective.

7 0
3 years ago
Other questions:
  • If 3x + 9y = 21 , find the value of 4(x + 3y)
    7·1 answer
  • Assign two variables for each problem, and write the equations. Do not solve.
    11·2 answers
  • The top of a ladder rests at a height
    7·1 answer
  • Solve 5x + 7 ≥ 2<br><br> (just putting this here since the question is too short)
    9·2 answers
  • 10. How many solutions does the equation have? 4b − 10 = 2(2b − 5)
    15·1 answer
  • Calculate
    9·1 answer
  • Look at image please help me
    14·2 answers
  • Select the correct answer.
    7·1 answer
  • Can u help me plz fast
    11·1 answer
  • george is going to buy a used car that is 4,500. he is going to pay 3/4 of the car and his parents are going to pay the rest. ho
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!