Answer:
6
Step-by-step explanation:
The equation for this problem would be c = (20 + 8) / 2 - 8. Add 20 and 8 to get 28, divide 28 by 2 to get 14, then subtract 8 to get 6.
Answer:
The mean of the random variable is 0.
The variance of the random variable is 
Step-by-step explanation:
We are given the following probability distribution:





Mean:
Sum of each value multiplied by its probabilities. So

The mean of the random variable is 0.
Variance:
Sum of the difference squared between each value and the mean, multiplied by its probabilities. So

The variance of the random variable is 
Yes she does if she has three times as many prizes as students
Iwould think its Corresponding angles are congruent
Triangle Sum Theorem
<span>Measure of angle AED is 28°
I hope I helped
Brainliest would be appreciated
Have a great day!</span>