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
sukhopar [10]
1 year ago
13

Help pleaseeeeee need ASAP

Mathematics
1 answer:
Degger [83]1 year ago
3 0

Answer:

-1

Step-by-step explanation:

Via exponent properties:

3b-1 = b-3

2b = -2

b=-1

You might be interested in
A dog collar was originally priced at $5 but went on sale for 20% off. If Vince bought the dog collar and paid 9% sales tax, how
Vlada [557]

Answer:$4.36

Step-by-step explanation:

5(0.8)= 4

4(1.09) = $4.36

3 0
2 years ago
What is the value of 9^-1/2
qaws [65]

Answer:

81-1/2

80/2

40 and right than say

7 0
2 years ago
Read 2 more answers
A. 3.4
seropon [69]
A is your answer 3.4

Use Pythagorean Theroum

10.2 squared = 9.6 squared + x squared
104= 92.6+x squared
x squared = 11.4
x= 3.37
round x to 3.4

Hope that helps!
4 0
3 years ago
Please help fast I’m not sure exactly how to do this or find it
Vanyuwa [196]
The answer would be B check the picture for work.

7 0
2 years ago
Read 2 more answers
10. A manufacturer wanted to know if more coupons would be redeemed if they were mailed to the
Mandarinka [93]

Using the t-distribution, it is found that the data does not provide convincing evidence that the mean number is greater when the coupons were addressed to a female.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if there is no difference, that is, the mean is of 0, hence:

H_0: \mu = 0

At the alternative hypothesis, it is tested if the mean number is greater for females, that is, the mean is greater than 0, hence:

H_1: \mu > 0

<h3>What is the test statistic?</h3>

The test statistic is given by:

t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}

The parameters are:

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

In this problem, the parameters are given as follows:

\overline{x} = 1.5, \mu = 0, s = 4.75, n = 50.

Hence, the test statistic is given by:

t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{1.5 - 0}{\frac{4.75}{\sqrt{50}}}

t = 2.23

<h3>What is the conclusion?</h3>

Considering a <em>right-tailed test</em>, as we are testing if the mean is greater than a value, with a <em>significance level of 0.01 and 50 - 1 = 49 df</em>, the critical value is given by t^{\ast} = 2.4.

Since the test statistic is less than the critical value for the right-tailed test, the data does not provide convincing evidence that the mean number is greater when the coupons were addressed to a female.

More can be learned about the t-distribution at brainly.com/question/26454209

5 0
1 year ago
Other questions:
  • its the end of the school year and a tenth grade civics class is planning a barbecue to celebrate. the class has drinks and dess
    8·1 answer
  • Simplify (2/9)^3 please
    9·1 answer
  • Question 1
    10·1 answer
  • Find the slope of the line that passes through (10, 8) and (1, 1).
    10·1 answer
  • Please help don't understand
    6·1 answer
  • Suppose that $9500 is placed in an account that pays 4% interest compounded each year.
    13·1 answer
  • Which letter has a line of symmetry?
    13·1 answer
  • Write five 7 -digits numbers
    5·2 answers
  • How many 3/4 cup servings are there in 12 cups of cereal?
    5·2 answers
  • Out of every 6 students surveyed, 1 listens to country music. At this rate, how many students in a school of 1,200 listen to cou
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!