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EleoNora [17]
3 years ago
8

PLEASE HELP WILL GIVE BRAINLIEST

Mathematics
1 answer:
GuDViN [60]3 years ago
3 0

Answer:

\frac{x^{2} + 19x + 102}{4(x + 5)(x + 7)}

Step-by-step explanation:

I have factored and multiplied lwh to get the volumes

Vol. = \frac{2x - 1}{(2x - 3)(x + 5)} \frac{2(2x - 3)}{3x - 1}\frac{(3x - 1)(x + 3)}{(2x - 1)(x + 3)} + \frac{x - 5}{3x + 2}\frac{3x + 2}{4}\frac{x - 2}{(x + 7)(x - 5)}

      = \frac{4}{x + 5} + \frac{x - 2}{4(x + 7)}

      = \frac{4(4)(x + 7) + (x - 2)(x + 5)}{4(x + 5)(x + 7)}

      =  \frac{16x + 112 + x^{2} + 3x -10}{4(x + 5)(x + 7)}

      = \frac{x^{2} + 19x + 102}{4(x + 5)(x + 7)}

If I have done everything correctly, then \frac{x^{2} + 19x + 102}{4(x + 5)(x + 7)} is the total volume

This a real exercise in factoring and multiplying and adding fractions

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So 273,600 is how many in one hour.
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Please help: The base edge of a Square pyramid is 30 cm. The pyramid is 6 cm tall. Find the volume of the pyramid.
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3 years ago
Does anyone understand this. Please help!!
Elodia [21]
The Claim of the exam creator is:

Nine times out of ten, seniors will have an average score within 5% of 75%.

We can rewrite this statement as:

Nine times out of ten or 90% of the times, seniors will have an average score within 5% of 75% i.e from 70% to 80%.

Thus we can say, the exam creator is 90% confident that the seniors will have an average score between 70% to 80%.

From here we can conclude that the Confidence Level is 90%. 

Margin of error means by how much points the population parameters will vary from the sample mean/sample proportion. We are provided this information in the question:

Seniors will have an average score within 5% of 75%.

Thus the margin of Error will be 5% and the sample proportion is 75%.

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The exam creator is 90% confident that the seniors will have an average scores between 70% to 80%

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