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4 years ago

Help me asap ASAP ASAP

Mathematics

1 answer:

Kobotan [32]4 years ago

8 0

Standard form as in Ax + By = C ???
3/7x + y = -5

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If the sales tax in your city is 6.1%, and an item costs $167

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3 years ago

Three cards are drawn from an ordinary deck of 52 without replacement. What is the probability of getting all black cards?

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4 years ago

The two interior opposite angles of an exterior angle of a triangle are 60% and 80 Find the measure of the exterior angle please

morpeh [17]

Answer:

2. The two interior opposite angles of an exterior angle of a triangle are and . Find the measure of the exterior angle. 

Step-by-step explanation:

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2 years ago

The National Sporting Goods Association (NSGA) conducted a survey of the ages of people that purchased athletic footwear in 2009

Sauron [17]

The sample deviation of a distribution is the square root of the variance

The average age of the distribution is 37.26
The sample standard deviation is 21.27

<h3>How to calculate the average age</h3>

Using a midpoint of 10 for the first class, and 75 for the last, we have the following frequency distribution:

<u>Age Percentage</u>

10 20

15.5 5

21 10

29.5 13

39.5 15

54.5 25

75 12

The average age is then calculated as:

$E(x) = \sum x * P(x)$

So, we have:

$E(x) =10 * 20\% + 15.5* 5\% + 21 * 10\% + 29.5*13\% + 39.5*15\% + 54.5 * 25\% + 75 *12\%$

$E(x) =37.26$

Hence, the average age of the distribution is 37.26

<h3>How to calculate the sample standard deviation</h3>

This is calculated using:

$\sigma = \sqrt{E(x^2) - E(x)^2}$

Where:

$E(x^2) =10^2 * 20\% + 15.5^2* 5\% + 21^2 * 10\% + 29.5^2*13\% + 39.5^2*15\% + 54.5^2 * 25\% + 75^2 *12\%$

Evaluate the products

$E(x^2) =1840.845$

The equation becomes

$\sigma = \sqrt{1840.845- 37.26^2}$

$\sigma = 21.27$

Hence, the sample standard deviation is 21.27

Read more about average and sample standard deviation at:

brainly.com/question/15858152

4 0

2 years ago