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Damm [24]
1 year ago
8

What is w equivalent to 7w-6=3(w+4) + 4w

Mathematics
1 answer:
DochEvi [55]1 year ago
5 0

Answer:

w is undefined, no solutions.

Step-by-step explanation:

7w - 6 = 3(w + 4) + 4w

7w - 6 = 3w + 12 + 4w

7w - 6 = 7w + 12

-6 = 12

w is undefined, no solutions.

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90% of what number is 57
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What is the hypothesis of the following statement if a figure is a square,then it has four sides
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Conditional statement 
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Pls answer, need to have it by Friday <br><br> Thank you
puteri [66]

Answer:

Step-by-step explanation:

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8 0
2 years ago
the equation y=0.5x represents the distance henry hikes, in miles, over time, in hours. the graph represents the rate that clark
zheka24 [161]

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6 0
3 years ago
In a survey of adults aged 57 through 85​ years, it was found that 86.6​% of them used at least one prescription medication. Com
OleMash [197]

Answer:

a) 272 used at least one prescription​ medication.

b) The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).

Step-by-step explanation:

Question a:

86.6% out of 3149, so:

0.866*3149 = 2727.

272 used at least one prescription​ medication.

Question b:

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 z-score that has a p-value of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 3149, \pi = 0.866

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.  

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.866 - 1.645\sqrt{\frac{0.866*0.134}{3149}} = 0.856

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.866 + 1.645\sqrt{\frac{0.866*0.134}{3149}} = 0.876

For the percentage:

0.856*100% = 85.6%

0.876*100% = 87.6%.

The 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication is (85.6%, 87.6%).

7 0
3 years ago
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