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3 years ago

Could someone help me please? You could do the ones you know, and try to explain.

Mathematics

1 answer:

Ne4ueva [31]3 years ago

7 0

Answer:

I only know the answer to B which is 50*

Step-by-step explanation:

B is 50* because there are 3 vertical lines therefore the angle opposite of 80* is also 80* so when we add them together, we can take 160* out of the 360* whole. so now we are left with 200* which are 2 sets of vertical lines and one of each of the vertical lines are x therefore the remaining angles are equal so all I have to do is divided 200* by 4 which is 50 therefore x is equal to 50*.

PS: the * sign is supposed to be the degree sign but I don't have it on the keyboard so just act as if it was the degree sign lol

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Listed below are prices in dollars for one night at different hotels in a certain region. Find the range, variance, and standar

Vanyuwa [196]

Answer:

Range = $115

Variance = $1915.2857

Standard deviation = $43.764

Step-by-step explanation:

Given the data:

234 160 119 131 218 207 146 141

Arranging in ascending order :

119, 131, 141, 146, 160, 207, 218, 234

The range = maximum - minimum

The range = 234 - 119 = 115

The variance :

Σ(x - mean)²/n-1

The mean = Σx / n

The mean = 1356 / 8 = 169.5

Variance :

Σ(x - mean)² = (119-169.5)² + (131-169.5)² + (141-169.5)² + (146-169.5)² + (160-169.5)² + (207-169.5)² + (218-169.5)² + (234-169.5)² = 13407

n - 1 = 8 - 1 = 7

Variance = 13407 / 7 = 1915.2857

Standard deviation = √variance

Standard deviation = √1915.2857

Standard deviation = $43.764

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3 years ago

Jenny uses a roller to paint a wall. The roller has a radius of 1.75 inches and a height of 10 inches. In two rolls, what is the

Katen [24]

Answer:

The area of the wall that she will paint in two rolls is <u>219.8 inches²</u>.

Step-by-step explanation:

Given:

Jenny uses a roller to paint a wall. The roller has a radius of 1.75 inches and a height of 10 inches.

Now, to find the area of the wall that she will paint in two rolls.

So, we find the lateral surface area of roller.

Radius (r) = 1.75 inches.

Height (h) = 10 inches.

So, to get the lateral surface area we put formula:

$A_{L} =2\pi rh$

$A_L=2\times 3.14\times 1.75\times 10$

$A_L=109.9\ inches^2.$

Thus, the lateral surface area of the roller = 109.9 inches².

Now, to get the area of wall that she will paint in two rolls we multiply 2 by the lateral surface area of the roller:

$109.9\times 2\\\\=219.8\ inches^2.$

Therefore, the area of the wall that she will paint in two rolls is 219.8 inches².

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4 years ago

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The Flynn family eats at a restaurant that is having a 5% discount promotion. Their meal costs $62.62, and they leave an 18% tip

mr Goodwill [35]

5% of $62.62= 3.13$
18% of $62.62= 11.28$
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A walkway forms one diagonal of a square playground. The walkway is 18 m long.

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What is combined mean

FromTheMoon [43]

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