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Julli [10]
3 years ago
5

Can You Please Help Me.​

Mathematics
1 answer:
nadezda [96]3 years ago
4 0

Answer:

flip the > to a <

when it's negative always flip the sing

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the ratios of the measure sides of a triangle is 4:10:7. find the length of each side if the perimeter of the triangle is 252 me
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Answer:

Step-by-step explanation:

perimeter = 252

4:10:7 = 4 + 10 + 7 =21

10* 252/21 = 120

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Fiona finds that the distance between two cities is 83,400,000 millimeters. What is the distance between the two cities in kilom
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3 years ago
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You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question. Suppose that you h
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Answer:

(a) The expected score is 12.8

(b) The standard deviation is 3.2 and variance is 10.24

Step-by-step explanation:

Consider the provided information.

You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question.

Here n=64 p=1/5 and q=1-1/5=4/5

Part (a)  we need to find the expected score on the exam.

Expected = np

Expected score = number of questions × P(right)

Score = 64 \times \frac{1}{5} = 12.8

Hence, the expected score is 12.8

Part (b)  Compute the variance and standard deviation of x.

Standard Deviation: \sigma =\sqrt{npq}

Now calculate the standard deviation as shown:

\sigma =\sqrt{64\times \frac{1}{5}\times \frac{4}{5}}

\sigma =\sqrt{\frac{256}{25}}

\sigma =\frac{16}{5}=3.2

Variance: \sigma^2 =npq

\sigma^2 =64\times \frac{1}{5}\times \frac{4}{5}

\sigma^2 =\frac{256}{25}

\sigma^2 =10.24

Hence, the standard deviation is 3.2 and variance is 10.24

5 0
4 years ago
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