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Blababa [14]
2 years ago
15

Helppppppppppp again ! Pls

Mathematics
2 answers:
galina1969 [7]2 years ago
6 0
7 pls brainliest me have a good day
adell [148]2 years ago
4 0
7. on the graph when x is at 1, there is a point above it at 7. The point is (-1,7)
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Maya has some books she gives away 26 now she has 36 how many did she start with?​
poizon [28]

Answer:

62

Step-by-step explanation:

26+36=x

x=62

4 0
2 years ago
What is the area of this figure?
NARA [144]

Answer:

through lengthy mafs, your answer should be <u>307 mi (wrong somehow)</u>

Step-by-step explanation:

if you want an explanation, please, dont be afraid to comment ;)

(to other people who look this up the answer is actually 318 i dont know, but i got it wrong

7 0
2 years ago
Read 2 more answers
The Tempeture for last five days was :65,80,74,84,79,72 .whatwas the average tempeture .
ikadub [295]
The answer should be 90.8 because when you add up all the temp. you get 454 then you divide by # of days which is five 

hope this helps :)
8 0
2 years ago
Read 2 more answers
At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening
pav-90 [236]

Answer:

z=\frac{23-21}{\frac{3.5}{\sqrt{49}}}=4    

p_v =2*P(z>4)=0.0000633  

When we compare the significance level \alpha=0.1 we see that p_v so we can reject the null hypothesis at 10% of significance. So the  the true mean is difference from 21 at this significance level.

Step-by-step explanation:

Data given and notation  

\bar X=23 represent the sample mean

\sigma=3.5 represent the population standard deviation

n=49 sample size  

\mu_o =21 represent the value that we want to test

\alpha=0.1 represent the significance level for the hypothesis test.  

z 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 average age of the evening students is significantly different from 21, the system of hypothesis would be:  

Null hypothesis:\mu = 21  

Alternative hypothesis:\mu \neq 21  

The statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

Calculate the statistic

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

z=\frac{23-21}{\frac{3.5}{\sqrt{49}}}=4    

P-value

Since is a two sided test the p value would be:  

p_v =2*P(z>4)=0.0000633  

Conclusion  

When we compare the significance level \alpha=0.1 we see that p_v so we can reject the null hypothesis at 10% of significance. So the  the true mean is difference from 21 at this significance level.

8 0
3 years ago
Point a is located at -6/8 and point B is located at -1/8 what is the distance between points A and B
Ahat [919]
The distance between points A and B
(-1/8)-(-6/8) = 5/8

6 0
3 years ago
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