How should the domain of the parabola given below be restricted to ensure its inverse is a function?

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)?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Add the fractions and simplify 1/2+ 1/3