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NeX [460]
3 years ago
6

Please help! Will mark brainliest!

Mathematics
2 answers:
Furkat [3]3 years ago
7 0

Answer:

4) (-3 , 2)

Step-by-step explanation:

ella [17]3 years ago
3 0

Answer:

(-3, 2) because if you extend the line to the right more, it'll go directly through that point, but none of the others. also, if you plot the points, you can look at the line to see which point the line would go through

Step-by-step explanation:

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What is the solution to -7 + h = 72
enot [183]
H= 79
add 7 to both sides.
7 0
3 years ago
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A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 340 babies were​ born, a
Bas_tet [7]

Answer:

The 99% confidence interval estimate of the percentage of girls born is (0.8, 0.9).

b)Yes, the proportion of girls is significantly different from 0.5.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 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:

In the study 340 babies were​ born, and 289 of them were girls. This means that n = 340, \pi = \frac{289}{340} = 0.85

Use the sample data to construct a 99​% confidence interval estimate of the percentage of girls born.

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)}{340}} = 0.85 - 2.575\sqrt{\frac{0.85*0.15}{400}} = 0.80

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{340}} = 0.85 + 2.575\sqrt{\frac{0.85*0.15}{400}} = 0.90

The 99% confidence interval estimate of the percentage of girls born is (0.8, 0.9).

Does the method appear to be ​effective?

b)Yes, the proportion of girls is significantly different from 0.5.

4 0
3 years ago
You must use the LCD 1/7 + 3/14 *Convert Into into like fractions and add them
Tresset [83]
The LCD of 1/17 and 3/14 is 14.

1/7 = 2/14

3/14 = 3/14

2 + 3 = 5

The denominators are the same, so it will remain the same.

= 5/14 <===

5/14 is your answer.


I hope this helps! :)
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3 years ago
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Suma de fraccion 1/5 + 5/8​
lbvjy [14]

Answer:

33/40

Step-by-step explanation:

1/5x8= 8/40

5/8x5=25/40

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reduce answer:

33/40

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2 years ago
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The distance around a circle
PilotLPTM [1.2K]

Answer:

circumference

Step-by-step explanation:

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