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2 years ago

For the data set 4, 5, 10, 11, 15, the mean, x, is 9. What is the standard deviation?

Mathematics

2 answers:

Alborosie2 years ago

7 0

The standard deviation is 4.05

Galina-37 [17]2 years ago

5 0

Answer: A

Step-by-step explanation:

4.1

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Write the following expression using a single exponent. 3-5 × 36 A. 30 B. 3-11 C. 31 D. 3-30

fiasKO [112]

Answer:

3^1

Step-by-step explanation:

3^-5 * 3^6

When multiplying exponents with the same base, we can add the exponents

3^ ( -5+6)

3^1

7 0

2 years ago

Math help, thanks for the help. i'm very great full

rodikova [14]

4x +28 and 68 are vertical angles and are equal.

Set them to equal each other to solve for x:

4x +28 = 68

Subtract 28 from each side:

4x = 40

Divide both sides by 4:

x = 40/4

x = 10

4 0

2 years ago

What is the explicit formula of a1=-3,d=2

AVprozaik [17]

Answer:

The explicit formula for the given expression is 2 n - 3

Step-by-step explanation:

Here, the first term of sequence = -1

The common difference = 2

In a ARITHMETIC PROGRESSION:

The nth term of a sequence is given as

a(n) = a + (n-1) d

⇒ Here, a(n) = -1 + (n-1)(2)

= -1 + 2n -2

= 2n - 3

or, a(n) = 2n - 3

Hence, the explicit formula for the given expression is 2n - 3.

7 0

2 years ago

Find the total surface area for the hexagonal prism?

Mnenie [13.5K]

Answer:

572.5

Step-by-step explanation:

A=6ah + 3√(3) a²= 6·8·5+3√(3)·8²≈572.55376

a is base length and h is height

5 0

2 years ago

A cell phone provider offers a plan that costs $30 per month plus $0.10 per text message sent or received. A comparable plan c

mariarad [96]

300 messages would have to be sent or received in order for the plan to cost same each month.

Step-by-step explanation:

Given,

Cost per month = $30

Per text sent or received charges = $0.10

Let,

x be the number of texts sent or received.

A(x) = 0.10x+30

A comparable plan costs = $60 per month

Text messages are unlimited.

B(x) = 60

For the two plans to cost equal;

A(x) = B(x)

$0.10x+30=60\\0.10x=60-30\\0.10x=30$

Dividing both sides by 0.10

$\frac{0.10x}{0.10}=\frac{30}{0.10}\\x=300$

300 messages would have to be sent or received in order for the plan to cost same each month.

Keywords: function, addition

Learn more about functions at:

#LearnwithBrainly

3 0

2 years ago