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elena55 [62]
2 years ago
13

7 divided by 1/2

n="absmiddle" class="latex-formula">
​

Mathematics
2 answers:
Elan Coil [88]2 years ago
7 0
The answer should be 14
Lina20 [59]2 years ago
6 0

Answer:

14

Step-by-step explanation:

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A wholesale club sells eggs by the dozen. Does the table show a proportional relationship between the number of dozens of eggs a
tensa zangetsu [6.8K]

Answer: The table is proportional.

Step-by-step explanation: You would do 21/6 to get 3.5. Then 28/8 to get 3.5. After 35/10 to get 3.5. Finally 49/14 to get 3.5. If each answer (3.5) is the same than it is proportional.

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3 years ago
Tiffany pays $40 for 160 minutes of talk time.How many minutes of talk time does she get per dollar?
Natali5045456 [20]
She gets a talk time of 160/40 = 4
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3 years ago
Read 2 more answers
Please give me the correct answer ​
sergejj [24]

Answer:

16 units

Step-by-step explanation:

6.1 + 5.8 + 4.1 = 16

5 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
Solve each system by elimination.
max2010maxim [7]

Answer:

Step-by-step explanation:

-x-2y+4z=-14

x=-2y+4z+14

2x+2y+2z=-6

2x=-2y-2z-6

x= -y-z-3

-x-6z=-3

x=3-6z

8 0
3 years ago
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