Someone please help !! it would b real swaggy if you did :)

For the equations below which statement is true ?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + 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)?