Two angles of of a triangle measure 50 degrees is it unique?

Which statements are true? see picture

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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)?