All categories

3 years ago

Can anyone solve for x?

Mathematics

1 answer:

ziro4ka [17]3 years ago

6 0

Answer:

x = 4

Step-by-step explanation:

All the sides on a regular pentagon are equal to each other.

You might be interested in

4√3√2² please someone<br>

lubasha [3.4K]

Step-by-step explanation:

13.8564064606

hope it helps

6 0

3 years ago

Read 2 more answers

I didn’t really understand number 9

Leona [35]

1/2 m × 1/2 m × 1/2 m = s³

your answer should be 1/8 m³

7 0

3 years ago

Multiply or divide the following expression: Reduce all answers to lowest terms. Factor the following completely.

Semmy [17]

A function assigns the values. The value of f(-3) and f(3) + f(-3) is 8 and -8, respectively.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given the function f(x)=-x²-4x+5, therefore, the value of f(x) when the value of x is -3 is,

f(-3) = -(-3)² - 4(-3) + 5

f(-3) = -9 + 12 + 5

f(-3) = 8

Now, the value of f(x) when the value of x is 3 is,

f(3) = -(3)²-4(3)+5

f(3) = - 9 - 12 + 5

f(3) = -16

further, the value of f(3) + f(-3) is,

f(3) + f(-3) = -16 + 8

f(3) + f(-3) = -8

Hence, the value of f(-3) and f(3) + f(-3) is 8 and -8, respectively.

Learn more about Function:

brainly.com/question/5245372

#SPJ1

7 0

2 years ago

The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.02 level tha

docker41 [41]

Answer:

The p-value of the test statistic is 0.2019.

Step-by-step explanation:

Test if there is evidence at the 0.02 level that the medicine relieves pain in more than 384 seconds.

At the null hypothesis, we test if it relieves pain in at most 384 seconds, that is:

$H_0: \mu \leq 384$

At the alternative hypothesis, we test if it relieves pain in more than 384 seconds, that is:

$H_1: \mu > 384$

The test statistic is:

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

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

384 is tested at the null hypothesis:

This means that $\mu = 384$

For a sample of 41 patients, the mean time in which the medicine relieved pain was 387 seconds. Assume the population standard deviation is 23.

This means that $n = 41, X = 387, \sigma = 23$

Value of the test statistic:

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

$z = \frac{387 - 384}{\frac{23}{\sqrt{41}}}$

$z = 0.835$

P-value of the test:

The p-value of the test is the probability of finding a sample mean above 387, which is 1 subtracted by the p-value of z = 0.835.

Looking at the z-table, z = 0.835 has a p-value of 0.7981.

1 - 0.7981 = 0.2019

The p-value of the test statistic is 0.2019.

4 0

3 years ago

Which of the following is not a condition required for the regression procedure used in the exercises above to be statistically

saveliy_v [14]

Answer: A, E, B, and C

Step-by-step explanation:

A regression procedure require all of the following

1. Linearity: The relationship between X and the mean of Y must always be linear. C fulfills this condition

2. Homoscedasticity: Sometimes known as the homogeneity of avariance is always same for any given value of X. A also fulfills this condition.

3. Normality: A fixed values of X, and Y is always normally distributed. B and E fulfills this condition.

5 0

3 years ago