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torisob [31]
3 years ago
6

Giving brainliest !!!!

Mathematics
2 answers:
Artemon [7]3 years ago
8 0
I think 25?? I hate ixl, I’m so sorry you have to deal with that
AleksAgata [21]3 years ago
5 0

Answer:

25 square units

Step-by-step explanation:

Each side is 5 units.

5 x 5 = 25 square units

Hope that helps!

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A random sample of 85 sixth-graders in a large city take a course designed to improve scores on a reading comprehension test. Ba
BartSMP [9]

Answer:

12.6 < \mu < 14.8

For this case we can find the margin of error like this:

ME= \frac{14.8-12.6}{2}= 1.1

Since we need to divide the width of the interval by 2.

And now with the margin of error we can find the sample mean with any of the two following ways:

12.6 +1.1=13.7

14.8-1.1=13.7

So for this case the correct answer would be:

A. Sample Mean = 13.7; Margin of Error = 1.1

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Solution to the problem

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=85-1=84

We know that the confidence interval is given by:

12.6 < \mu < 14.8

For this case we can find the margin of error like this:

ME= \frac{14.8-12.6}{2}= 1.1

Since we need to divide the width of the interval by 2.

And now with the margin of error we can find the sample mean with any of the two following ways:

12.6 +1.1=13.7

14.8-1.1=13.7

So for this case the correct answer would be:

A. Sample Mean = 13.7; Margin of Error = 1.1

3 0
3 years ago
Find the value of the trigonometric ratio.<br> Answer has to be a reduced ratio.<br> PLS HELP!!
zloy xaker [14]

Answer:

3/5

Step-by-step explanation:

I'm not completely sure but from what I see it says 'sin <em>C </em>' and both 12 , 20 are on C.

so i simply just did 12/20

reduced once - 6/10

reduced twice - 3/5

4 0
3 years ago
What is the answer for -8=s+6
9966 [12]

Answer:

s=-14

Step-by-step explanation:

-8 = s+6       Given

-14 = s          Subtract 6 from both sides

7 0
3 years ago
Line JK bisects line LM at point J. Find JM if LJ=23 centimeters
vlada-n [284]
Ling JM is also 23 centimeters because line LJ and JM are a line but broken into two segments
4 0
3 years ago
Read 2 more answers
Complete each calculation using the distributive property.
Alisiya [41]
What are the answer options?
7 0
3 years ago
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