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konstantin123 [22]
3 years ago
6

Will give you (Brainliest)

Mathematics
2 answers:
Kobotan [32]3 years ago
6 0
<h3>Answer:</h3>

7

<h3>Explanation:</h3>

The formula usually used for the sum of interior angles of an n-sided convex polygon is ...

... angle sum = 180°×(n -2)

In your case, angle sum is 900°, so this becomes

... 900 = 180(n -2)

... 5 = n -2 . . . . . . . . . divide by 180

... 7 = n . . . . . . . . . . . the polygon has 7 sides

_____

It may be easy to remember that the sum of exterior angles is always 360°, and each exterior angle adds to its corresponding interior angle to make 180°. Then, for n angles The sum of interior and exterior angles is n·180°. Subtracting the sum of exterior angles from this gives the sum of interior angles: n·180° -360° = 180°(n-2).

den301095 [7]3 years ago
5 0
The only answer i know is the 1st one... sorry. and it is 7
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If 141 people attend a concert and tickets for adults cost $3.5 while tickets for children cost $2.5 and total receipts for the
Arturiano [62]

Answer: There are 69 adults and 72 children went to the concert.

Step-by-step explanation:

Let x be the number of adults, and y be the number of children.

x + y = 141

3.5x + 2.5y = 421.5

x + y =141

x = 141 - y

3.5(141 - y) + 2.5y = 421.5

493.5 - 3.5y + 2.5y = 421.5

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y = 72

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x = 69

6 0
3 years ago
Explain the following types of angles:
ZanzabumX [31]

Answer:

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6 0
2 years ago
What is the probability that the mean duration of the 24 rowers with idna exceeds 63 minutes?
statuscvo [17]

Answer:

Step-by-step explanation:

Given that: Training-session duration of female rowers with normal iron status is Normally distributed, with mean 69 minutes and standard deviation 18minutes.

Solution:

z score shows the relationship between sample means. The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by the formula:

z=\frac{x-\mu}{\sigma}\\\\for\ sample(n):\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }  \\\\where\ \mu=mean,\sigma=standard\ deviation,x=raw\ score

Given that μ = 69 minutes, σ = 18 minutes, n = 24

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z=\frac{x-\mu}{\sigma / \sqrt{n} } =\frac{63-69}{18/\sqrt{24} }=-1.63

From the distribution table, P(x > 63) = P(z > -1.63) = 1 - P(z < 1.63) = 1 - 0.0516 = 0.9484

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3 years ago
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alexandr402 [8]

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Please see the attached picture for full solution

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8 0
3 years ago
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Alex777 [14]

Answer:

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Step-by-step explanation:

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3 years ago
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