Answer: BD = 5.36 ≈ 5.4
Step-by-step explanation:
length of line AB = length of line BC = 20, line DE ≈ 9.28
Since the length of line AB and line BC are equal, it follows that the length of line BD and line EC are also equal. Therefore, to get the length of line BD will be the difference between the length of lines BC and DE; the result is then divided by 2. The result gives us the length of line BD or line EC because the length of lines BD and EC are equal [BD = EC]
Mathematically,
BD = 
= 
= 
BD = 5.36 ≈ 5.4
Answer:
1
Step-by-step explanation:
Since the coefficient of x is always double the second number in a squared binomial -> (x-1), -2 is double -1. -1 squared gives you 1.
It should be D, if -7x-2 is 14, then -5x-2 will be 10.
Answer:
Mean = 94
Standard deviation = 1.12
The sampling distribution of the sample mean is going to be normally distributed, beause the size of the samples are 80, which is larger than 30.
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a random variable X, with mean 
and standard deviation 
, the sample means with size n of at least 30 can be approximated to a normal distribution with mean and standard deviation, which is also called standard error 
In this problem, we have that:
By the Central Limit Theorem
The sampling distribution of the sample mean is going to be normally distributed, beause the size of the samples are 80, which is larger than 30.
Mean = 94
Standard deviation:
About 80% of a cookie each
