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Arlecino [84]
2 years ago
10

Working with the Concepts.

Mathematics
1 answer:
Softa [21]2 years ago
6 0

The standard deviation of the mileage for the sample of convertibles is 1.98977 miles.

<h3>What is standard deviation? </h3>

Standard deviation is used to determine how the values in a group differs from the mean of the values in the group. It is a measure of variation.

<h3>What is the standard deviation of the mileage? </h3>

In order to determine the standard deviation, take the following steps:

  • Determine the mean of the observation:

(25 + 25 + 24 + 21 + 21 + 21 + 20) / 7 =22.43

  • Determine the difference between each value and the mean and then square the result:

(25 - 22.43)² = 6.6049

(25 - 22.43)² = 6.6049

(24 - 22.43)² = 2.4649

(21 - 22.43)² = 2.0449

(21 - 22.43)² = 2.0449

(21 - 22.43)² = 2.0449

(20 - 22.43)² = 5.9049

Sum of squared difference = 27.7143

  • Determine the mean of the square differences and then find the square root of the mean:

√27.7143 / 7 = 1.98977

To learn more about standard deviation, please check: brainly.com/question/12402189

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Answer: x = 0

Step-by-step explanation:

4x − 3 + x = 7x − 3

Step 1: Simplify both sides of the equation.

4x − 3 + x = 7x − 3

4x + −3 + x = 7x + −3

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5x + −3 = 7x − 3

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Step 2: Subtract 7x from both sides.

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−2x − 3 = −3

Step 3: Add 3 to both sides.

−2x − 3 + 3 = −3 + 3

−2x = 0

Step 4: Divide both sides by -2.

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3 0
3 years ago
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solniwko [45]

Answer:

only A is correct

Step-by-step explanation:

To get the equation of the given line, we just have to see if the point given fits into any of the equation

The given point is (15,3)

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This is correct

b) y = -5(-75) = -375; this is not correct

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This is not correct

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This is incorrect

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This is incorrect

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This is also incorrect

7 0
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Answer:

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Step-by-step explanation:

Two circles of radii 5 cm and 4 cm intersect at two points D and E.

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Consider triangle ACD. In this triangle,

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So, this is right triangle and therefore, AC is the height of isosceles triangle ADE (triangle ADE is isosceles, because AE = AD).

The height of the isosceles triangle drawn to the base is its median, so CD = CE = 4 cm, hence

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Step-by-step explanation:

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