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3 years ago

What is the mean average of 17,1,14,7,12,15

Mathematics

1 answer:

Debora [2.8K]3 years ago

6 0

Answer:

10.4

Step-by-step explanation:

1,7,12,15,17

Added = 52

52÷5=10.4

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A school book fair has 72 non fiction books and 328fiction books for sale. What percent of the book fair is non fiction books

Varvara68 [4.7K]

Answer:

18%

Step-by-step explanation:

Non fiction books - 72

Fiction Books - 328

Total Books - 400

72 + 328 = 400

Percent of non fiction books to book fair - 18%

$\frac{72}{400}$

Simplify it until it has a denominator of 100, since that is the standard denomination for percentages.

$\frac{18}{100}$

18% or 0.18.

8 0

3 years ago

The mean annual incomes of certified welders are normally distributed with the mean of $50,000 and a population standard deviati

garik1379 [7]

Answer:

Their welders earn $50,000 annually.

Step-by-step explanation:

Given : $\mu = 50,000$

$\sigma = 2000$

n = 100

$\bar{x}=50350$

To Find : The ship building association wishes to find out whether their welders earn more or less than $50,000 annually.

Solution :

$H_0:\mu = 50000\\H_a: \mu \neq 50000$

n = 100

Since n > 30

So we will use z test

$z= \frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

Substitute the values

$z= \frac{50350-50000}{\frac{2000}{\sqrt{100}}}$

$z=1.75$

Refer the z table for p value

p value = 0.9599

α= 0.05

Since p value > α

So we accept the null hypothesis .

Hence their welders earn $50,000 annually.

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3 years ago

Please help me with this :)

skad [1K]

Mathspapa a website that will help.

6 0

3 years ago

G(x) = x2 + 3, what is the change made to g(x) if the parent function is f(x) = x2?

swat32

G(x) x^2 + 3 is obtained by shifting the graph of f(x) = x^2 3 units up.

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3 years ago

What is the answer for this problem in the picture

DENIUS [597]

<u>Answer:</u>

The correct answer option is $= 8 x ^ 4 y z ^ 4 \sqrt{2yz}$ .

<u>Step-by-step explanation:</u>

We are given the following expression and we are to simplify it and determine whether which of the given expressions is equivalent to it, assuming $y\geq 0$ and $z\geq 0$ :

$\sqrt { 128 x ^ 8 y ^ 3 z ^ 9 }$

Breaking the terms to get:

$\sqrt { 128 x ^ 8 y ^ 3 z ^ 9 }$ $=8\sqrt{2yz} \times x^{8\times\frac{1}{2} } \times y^{2\times \frac{1}{2} } \times z^{8\times \frac{1}{2} }$

$= 8 x ^ 4 y z ^ 4 \sqrt{2yz}$

4 0

4 years ago

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What is the mean average of 17,1,14,7,12,15​

What is the mean average of 17,1,14,7,12,15