Answer:
45 mins
Step-by-step explanation:
This seems like a lot more work than it is, but here we go
Simplifying<span>8 + -2y = 3y + -2
Reorder the terms:
8 + -2y = -2 + 3y
Solving
8 + -2y = -2 + 3y
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-3y' to each side of the equation.
8 + -2y + -3y = -2 + 3y + -3y
Combine like terms: -2y + -3y = -5y
8 + -5y = -2 + 3y + -3y
Combine like terms: 3y + -3y = 0
8 + -5y = -2 + 0
8 + -5y = -2
Add '-8' to each side of the equation.
8 + -8 + -5y = -2 + -8
Combine like terms: 8 + -8 = 0
0 + -5y = -2 + -8
-5y = -2 + -8
Combine like terms: -2 + -8 = -10
-5y = -10
Divide each side by '-5'.
y = 2
Simplifying
y = 2</span>
Answer:
18
Explanation:
Square root of 4 is 2. So replace it
(3x2) 3
6 x 3 = 18
Using the Central Limit Theorem, it is found that since the sample size is greater than 30, a normal approximation can be used, hence the test can be made.
<h3>Central Limit Theorem</h3>
The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean
and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the sampling distribution is also approximately normal, as long as n is at least 30.
In this problem, the distribution of lengths is skewed, however, since the sample size is of 100 greater than 30, a normal approximation can be used, hence the test can be made.
To learn more about the Central Limit Theorem, you can check brainly.com/question/24663213