1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kykrilka [37]
3 years ago
11

Help me out here please

Mathematics
2 answers:
Alinara [238K]3 years ago
4 0

Answer:

the answer would be -4 because it is attached to the x i think

Step-by-step explanation:

VLD [36.1K]3 years ago
3 0

Step-by-step explanation:

the answe to dis question is 2

You might be interested in
Ok here we go plz help me
Pepsi [2]

Answer:

I don't have much time cause Zoom is gonna start but the answer to 8 is <u><em>B</em></u>

Step-by-step explanation:

The answer is <em>B</em> because since it's a triangle it will always add up to 180.

Triangles= 180 always

5 0
3 years ago
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is current
lapo4ka [179]

Using the z-distribution, we have that:

a)

The hypothesis test is:

  • H_0: \mu = 7.4
  • H_1: \mu < 7.4

The p-value is of 0.0668.

The critical value is z^{\ast} = -1.28

b) Since the <u>test statistic is less than the critical value</u> for the left-tailed test, there is enough evidence to conclude that the null hypothesis will be rejected.

Item a:

At the null hypothesis, it is <u>tested if the mean is of 7.4 minutes</u>, that is:

H_0: \mu = 7.4

At the alternative hypothesis, it is <u>tested if the mean is lower than 7.4 minutes</u>, that is:

H_1: \mu < 7.4

We have the <u>standard deviation for the population</u>, hence, the z-distribution is used.

The test statistic is given by:

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

The parameters are:

  • \overline{x} is the sample mean.
  • \mu is the value tested at the null hypothesis.
  • \sigma is the standard deviation of the sample.
  • n is the sample size.

For this problem, the values of the <em>parameters </em>are: \overline{x} = 7.1, \mu = 7.4, \sigma = 1.2, n = 36.

Hence, the value of the <em>test statistic</em> is:

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

z = \frac{7.1 - 7.4}{\frac{1.2}{\sqrt{36}}}

z = -1.5

Using a z-distribution calculator, the p-value is of 0.0668.

Also using a calculator, considering a <u>left-tailed test</u>, as we are testing if the mean is less than a value, the critical value with a <u>significance level of 0.1</u> is of z^{\ast} = -1.28.

Item b:

Since the <u>test statistic is less than the critical value</u> for the left-tailed test, there is enough evidence to conclude that the null hypothesis will be rejected.

You can learn more about the use of the z-distribution to test an hypothesis at brainly.com/question/16313918

5 0
2 years ago
What is 1+1 I will name them branliest if they can help me
Gemiola [76]

Step-by-step explanation:

2

hope it helps.

thank you

6 0
1 year ago
Steve went to the grocery store. The initial subtotal of his bill was $105.23. Steve then used 5
Mrac [35]

Answer:

105.23-101.48=3.75

3.75/5=0.75

Step-by-step explanation:

3 0
2 years ago
Suppose there is a 13.9 % probability that a randomly selected person aged 40 years or older is a jogger. In​ addition, there is
Blababa [14]

Answer:

There is a 2.17% probability that a randomly selected person aged 40 years or older is male and jogs.

It would be unusual to randomly select a person aged 40 years or older who is male and jogs.

Step-by-step explanation:

We have these following probabilities.

A 13.9% probability that a randomly selected person aged 40 years or older is a jogger, so P(A) = 0.13.

In​ addition, there is a 15.6% probability that a randomly selected person aged 40 years or older is male comma given that he or she jogs. I am going to say that P(B) is the probability that is a male. P(B/A) is the probability that the person is a male, given that he/she jogs. So P(B/A) = 0.156

The Bayes theorem states that:

P(B/A) = \frac{P(A \cap B)}{P(A)}

In which P(A \cap B) is the probability that the person does both thigs, so, in this problem, the probability that a randomly selected person aged 40 years or older is male and jogs.

So

P(A \cap B) = P(A).P(B/A) = 0.156*0.139 = 0.217

There is a 2.17% probability that a randomly selected person aged 40 years or older is male and jogs.

A probability is unusual when it is smaller than 5%.

So it would be unusual to randomly select a person aged 40 years or older who is male and jogs.

4 0
3 years ago
Other questions:
  • Round 8.95 to the nearest tenth.did the ones place change? explain
    12·2 answers
  • whats shape has a larger area: a rectangle that is 7 inches by 3/4 inches? or a square with a side length of 2 1/2 inches
    12·1 answer
  • Andrew estimated the weight of his dog to be 60 lb. The dog’s actual weight was 68 lb. What was the percent error in Andrew’s es
    6·1 answer
  • The equations for two distinct lines are given below.
    15·1 answer
  • What is the limit of <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1-%20e%5E%7Bx%7D%20%7D%7B1%2B2e%5Ex%7D%20" id="TexFormula1"
    8·1 answer
  • Help with this one!<br><br><br> Show steps pls :)
    6·1 answer
  • Assume the
    12·1 answer
  • Which table corresponds to the function y = -3x + 11?
    13·1 answer
  • What is the area of a greeting card that is 1/4 foot wide by 1/3 foot tall
    9·2 answers
  • Help math pklz hekllo
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!