Solve x^2+4x=1 for x by completing the square

What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2

What is the reflection image of (5,-3) across the line y = -x?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?