Answer:
3x-21
Step-by-step explanation:
3*x+3*(-7)=3x-21
Answer:
The standard deviation of the residuals calculates how much the data points spread around the regression line. The result is used to measure the error of the regression line's predictability.
Step-by-step explanation:
<h2>How do you find the standard deviation around the regression line?</h2>
STDEV. S(errors) = (SQRT(1 minus R-squared)) x STDEV. S(Y). So, if you know the standard deviation of Y, and you know the correlation between Y and X, you can figure out what the standard deviation of the errors would be be if you regressed Y on X.
<h2>What does standard deviation tell you?</h2>
A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.
sine(X) = opposite side / hypotenuse
sine(X) = (2√11) / (4√11)
sine(X) = (2/4)
sine(X) = 0.5
X = arcsine(0.5)
<em>X = 30° </em>
Answer:
Step-by-step explanation:
The admission fee into the state ride is $8 and each ride cost additional four dollars.
Let x represent the number of rides that Karen takes at the state fair.
Let y represent the total cost of x rides
Therefore, if Karen takes x ride at the state fair, the total cost of x ride would be
y = 4x + 8
Karen only has $30.00. Therefore, the number of rides that Karen can go on will be
30 = 4x + 8
4x = 30 - 8 = 22
x = 22/4 = 5.5
Karen can only go on 5 rides. She will get a balance of $2
