Find the value of x.
2 answers:
Answer:
X = 60
Step-by-step explanation:
All angles in a triangle have to add up to 180 degrees. Therefore we can set up an equation like this:
Now, all we have to do is solve:
Therefore, x is equal to 60.
We can check this by plugging x into the angles and adding all of them up :
40 + (60 + 20) + 60 = 180
40 + 80 + 60 = 180
120 + 60 = 180
180 = 180
<em>I hope this helps!!</em>
<em>If you have any questions let me know!</em>
<em>- Kay :)</em>
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so,
p = 0.50
The Error is 10% percentage point. This means that on either side of the population proportion the error is 5% so E = 0.05
z = 1.645 (Z value for 90% confidence interval)
The margin of error for population proportion is calculated as:
This means 271 students should be included in the sample