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2 years ago

Answer to get points !!!

Mathematics

1 answer:

Yuliya22 [10]2 years ago

4 0

Answer:

Part A: x = 6

Part B: S = 3.51

Step-by-step explanation:

How to Find the Mean

Add up all data values to get the sum

Count the number of values in your data set

Divide the sum by the count

Calculate the mean of 2,3,4,5,8,8,12

Step 1: Add all the numbers together, to find the sum

2 + 3 + 4 + 5 + 8 + 8 + 12 = 42

Step 2: Count the number of values in your data set

There are 7 numbers

Step 3: Divide the sum by the count

42 ÷ 7 = 6

So the mean is 6

How to find sample standard deviation, look at the picture

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In January, a publishing house printed 15,000 mathematic textbooks and 3,768 mathematic textbooks unsold in July. How many mathe

lyudmila [28]

Answer:

Step-by-step explanation:

15000 - 3768

= 11232

11232 ÷ 2

= 5616 textbooks

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3 years ago

write the equation of the ellipse using the given information: the ellipse has foci (0,3) and (0,-3) and major vertices (0,5) an

svetlana [45]

Answer: (x^2)/16 + (y^2)/25 = 1

Step-by-step explanation:

According to the problem we can figure out that the center of the ellipse is (0,0).

Since the foci is (0,3) and (0,-3) we know that the value of c is 3. The major vertices are (0,5) and (0,-5) so the value of a is 5.

If we put this into the equation a^2=b^2 + c^2, we get 25=9+ b^2

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Now since we know that the ellipse is vertical because the x value didn’t change, we know that the b^2 value comes first in the equation. Then the a^2 value which is 25.

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3 years ago

Pierre lives in a tall apartment building. He looks out his window and spots a car on the road that runs straight toward his bui

zhannawk [14.2K]

Answer:

it is coming 292.19 feet so approx 293.3 feet is the correct option

Step-by-step explanation:

7 0

3 years ago

Mary and her mother walked at a constant rate of 3 miles per hour. Select the phrases from the drop-down menus to correctly comp

Lena [83]

Answer:

3/5 hours

2,4 miles

Step-by-step explanation:

v = 3 m/h (constant)

v = d/t

3 = 1,8/t

t = 1,8/3

$1,8 = 0,1 . 18\\t = \frac{18 . 0,1}{3} \\t = 6 . 0,01\\t = \frac{6}{10} = \frac{3}{5} hours$

$3 = \frac{d}{\frac{4}{5} }$

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3 0

4 years ago

There are 10 gallons of water in a tank. Each minute, 4 more gallons are added. The volume of the water in a tank after t minute

lukranit [14]

Answer:

V = 10 + 4t

Step-by-step explanation:

To find the equation, look at the pattern:

10 gallons + 4 gallons = 14 gallons after 1 minute
10 + 4 + 4 = 18 after 2 minutes
10 + 4+4+4 = 22 after 3 minutes.

The pattern is 10 + 4 (t) = V

8 0

3 years ago

Answer to get points !!!​

Answer to get points !!!