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RideAnS [48]
3 years ago
12

Find the variance. Round to the nearest tenth.

Mathematics
2 answers:
BARSIC [14]3 years ago
8 0

Answer:

41.2 to the nearest tenth.

Step-by-step explanation:

There are a total of 6 numbers.

So the mean m is (6 + 6 + 7 + 17 + 20 + 20) / 6

= 76/6

= 12.67.

Calculating x - m :

6 - 12.67 =  -6.67

6 - 12.67 = -6.67

7 - 12.67 = - 5.67

17 - 12.67 = 4.33

20 - 12.67 = 7.33

20 - 12.67 = 7.33

Now squaring each of these we get  (x - m)^2 = 44.49, 44.49, 32.15, 18.75,

53.73, 53.73

Now the sum of these ∑(x - m)^2 =  247.34

So the variance =  ∑ [(x - m)^2] / 6

= 247.34 / 6

= 41.2 to the nearest tenth.

-BARSIC- [3]3 years ago
4 0

Answer:

B) 41.2

Step-by-step explanation:

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What is the volume of this equation?
Pachacha [2.7K]

Answer:

Volume ≈ 33.33 cubic feet

Step-by-step explanation:

The question is:

<em>Find the volume of a right square pyramid with base square edges measuring 5 feet each and a height of the pyramid be 4 feet.</em>

<em />

So, the base is a square with side length 5 feet.

And the height of the pyramid is 4 feet.

The volume of a pyramid is given by the formula:

V=\frac{a^2 h}{3}

Where

a is the square base side length (given as 5)

h is the height of the pyramid (given as 4)

Now we substitute and find the value:

V=\frac{a^2 h}{3}\\V=\frac{(5)^2 (4)}{3}\\V=33.33

The volume is around 33.33 cubic feet

5 0
3 years ago
N/-3-2=8 how do I solve this
Gnom [1K]

Answer:

n=-30

Explanation:

Given the equation:

\frac{n}{-3}-2=8

Step 1: Add 2 to both sides.

\begin{gathered} \frac{n}{-3}-2+2=8+2 \\ \frac{n}{-3}=10 \end{gathered}

Step 2: Multiply both sides by -3.

\begin{gathered} \frac{n}{-3}\times-3=10\times-3 \\ n=-30 \end{gathered}

The solution to the equation is n=-30,

6 0
2 years ago
Find the slope and write the equation to it and explain.
nikitadnepr [17]
B is your correct answer
8 0
3 years ago
Find the value of x in the isosceles triangle shown below.
Solnce55 [7]

Answer: B. x=10

Step-by-step explanation:

<u>Concept</u>

- If it is an isosceles triangle, then the altitude would also be the median of the base, meaning that it divides the base evenly.

- We are going to use the Pythagorean theorem which is a²+b²=c², where [a] and [b] are legs, and [c] is the hypotenuse.

<u>Given</u>

Hypotenuse (relative) = √74

Altitude (one leg) = 7

The other leg (half of the base) = x/2

<u>Solve</u>

a² + b² = c²

(7)² + (x/2)² = (√74)²

49 + x²/4 = 74

x²/4 = 25

x² = 100

x = 10

Hope this helps!! :)

Please let me know if you have any questions

8 0
3 years ago
Can someone please help me with this question
kondor19780726 [428]
A. 

To solve, you need to get the variable by itself. 
Order of operations:
Square root both sides.
(x-5)= plus/minus root 3, as 3 is not a perfect square.
Now you need to add 5 to both sides to get it to disappear on the side with the x.

x=root3 +or - 5, which can be rearranged so that 5 is the first term.
8 0
4 years ago
Read 2 more answers
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