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
Dovator [93]
2 years ago
9

DREE POINTS!! If u answer my math questions correctly I’ll make another DREE points.

Mathematics
2 answers:
garri49 [273]2 years ago
6 0

Answer:

Just look it up. I checked and it shows all the correct answers.

Step-by-step explanation:

Alecsey [184]2 years ago
6 0
2) complementary
3) sin A= cos B
Sorry I don’t really know the answer to question 4 hope this helps :)
You might be interested in
6y+x=8 Could someone explain how to do these equations and give the answer to this one
Mrrafil [7]

Answer:

it would be 2

Step-by-step explanation:

take the equation and do 8 - 6 and then you get the answer

7 0
3 years ago
Read 2 more answers
A random sample of n = 40 observations from a quantitative population produced a mean x = 2.2 and a standard deviation s = 0.29.
zmey [24]

Answer:

t=\frac{2.2-2.1}{\frac{0.29}{\sqrt{40}}}=2.18    

df=n-1=40-1=39  

Since is a one side test the p value would be:  

p_v =P(t_{(39)}>2.18)=0.0177  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and then the population mes seems to be higher than 2.1 at 5% of significance

Step-by-step explanation:

Data given and notation  

\bar X=2.2 represent the sample mean

s=0.29 represent the sample standard deviation

n=40 sample size  

\mu_o =2.1 represent the value that we want to test

\alpha=0.05 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is higher than 2,1, the system of hypothesis would be:  

Null hypothesis:\mu \leq 2.1  

Alternative hypothesis:\mu > 2.1  

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{2.2-2.1}{\frac{0.29}{\sqrt{40}}}=2.18    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=40-1=39  

Since is a one side test the p value would be:  

p_v =P(t_{(39)}>2.18)=0.0177  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and then the population mes seems to be higher than 2.1 at 5% of significance

7 0
3 years ago
A circle has a radius of 7 inches. What is the area of the circle?<br> Mark only one oval
Vikki [24]

Answer:A≈153.94in²

Step-by-step explanation:Hope this was helpful

3 0
3 years ago
5. Find the value of the 11th term of the arithmetic sequence <br> -2, 5, 12, 19, 26, ...(11th term)
ratelena [41]

Answer:

-2, 5, 12, 19, 26, 33, 40, 47, 54, 61, 68, 75, 82, 89, 96, 103

8 0
1 year ago
Which statement best describes the polynomial 2x^3-4?
Rama09 [41]
B because x is to the 3
8 0
3 years ago
Other questions:
  • A yoyo rotates 12 tomes every 3 seconds what is the yoyos unit rate for rotations per second
    7·2 answers
  • An angle measures 176.8° more than the measure of its supplementary angle. What is the measure of each angle?
    15·1 answer
  • The Great Pyramid of Giza is a square pyramid located by El Giza, Egypt. The height of the pyramid is currently 455 feet. The ba
    6·2 answers
  • F(x)=71(0.93)^2x growth or decay
    8·1 answer
  • Please check my answer. finals question. will give brainliest
    8·1 answer
  • Do you know this ?!?!!??!?!!!!!?!?
    12·1 answer
  • Anna buys 6 bottles of pineapple juice at the corner store for a total cost of $4.50.
    5·1 answer
  • The weight y of a object on Jupiter is proportional to the weight x of the object on earth. An object that weighs 150 ponds on e
    7·1 answer
  • A facilities manager at a university reads in a research report that the mean amount of time spent in the shower by an adult is
    11·1 answer
  • Why can you eliminate the solution of -0.2 in the context of this problem? Check all that apply.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!