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Kay [80]
3 years ago
9

I was gone today at school and know I have no clue what to do! Please please help me!!

Mathematics
1 answer:
krek1111 [17]3 years ago
5 0
What do you have to find?
do you just need to solve the problem with those numbers?
You might be interested in
Help me its simple for 10points !​
Sliva [168]

Answer: Slope = 3/4  |  down 3 over 4

Step-by-step explanation: First I went into desmos graphing calc and then marked the two points (-20,-4) and on a seprete line marked (-12,-10)  and then i took a ruler and put up to my screen to see if there was a simplified answer (ex: 2/4 = 1/2) there was not so I just went down to the y line of the 2nd dot which turned out to be 3 and then just counted over to the dot which was 4 units.

7 0
2 years ago
The manager of a store marks up all items by 15%. If x is the original price, what is the new price with the mark up?
Crank

Answer:

x + 0.15x = OP

Step-by-step explanation:

OP= Original Price

3 0
3 years ago
Suppose a local manufacturing company claims their production line has a variance of less than 9.0. A quality control engineer d
Alexxx [7]

Answer:

\chi^2 =\frac{35-1}{9} 2.12^2 =16.979

p_v =P(\chi^2

If we compare the p value and the significance level provided we see that p_v so on this case we have enough evidence in order to reject the null hypothesis at the significance level provided. And that means that the population variance is significantly lower than 9

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

n=35 represent the sample size

\alpha=0.01 represent the confidence level  

s =2.12 represent the sample deviation obtained

\sigma_0 =3 represent the value that we want to test

Null and alternative hypothesis

On this case we want to check if the population variance specification is lower than 9 and the deviation lower than 3, so the system of hypothesis would be:

Null Hypothesis: \sigma^2 \geq 9

Alternative hypothesis: \sigma^2

Calculate the statistic  

For this test we can use the following statistic:

\chi^2 =\frac{n-1}{\sigma^2_0} s^2

And this statistic is distributed chi square with n-1 degrees of freedom. We have eveything to replace.

\chi^2 =\frac{35-1}{9} 2.12^2 =16.979

Calculate the p value

In order to calculate the p value we need to have in count the degrees of freedom , on this case df= n-1= 35-1=34. And since is a left tailed test the p value would be given by:

p_v =P(\chi^2

In order to find the p value we can use the following code in excel:

"=CHISQ.DIST(16.979,34,TRUE)"

Conclusion

If we compare the p value and the significance level provided we see that p_v so on this case we have enough evidence in order to reject the null hypothesis at the significance level provided. And that means that the population variance is significantly lower than 9

6 0
3 years ago
How do you solve: 2(5+r)<br><br><br>A :7+r<br><br>B: 10+2r<br><br>C: 12r<br><br>D: 7+2r
maksim [4K]

Answer:

i think it´s b

Step-by-step explanation:

3 0
3 years ago
Amy bought 5lbs., 11oz. Of turkey cold cuts and 6lb., 12 oz. Of ham cold cuts. How much did she buy total? You should convert an
Alenkinab [10]

Answer:

12.5lb

Step-by-step explanation:

5lbs+6lb=11lb

11oz+12oz=1.5lbs

11lb+1.5lb=12.5

7 0
3 years ago
Read 2 more answers
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