Answer:
(y−2)29−x225=1
Step-by-step explanation:
Answer:
We have been given confidence interval 95%, mean 20 , data set 30 and standard deviation 3.
We will use the formula: 
Here,
Z-score value at 95% confidence interval is 1.96
On substituting the values in the formula to plug the values:

Now, we have a formula for marginal error:
Marginal error means your answer will be within that percentage only.
Say you have 3% marginal means your value will be within 3% real population 95% of the time.
Answer:
Step-by-step explanation:
Refraction, rotation and transformation are rigid motions,
so, they produce congruent figures.
Dilation does not preserve side length, so it is not a congruence transformation.