Help pleaseee
pic below

Based on what i know about mean, this doesn't add up.

1. a right triangle is graphed on a coordinate plane. find the length of the hypotenuse. round your answer to the nearest tenth. 2. use the angle relationship in the figure below to solve for the value of x. assume that lines a and b are parallel and line c is a transversal.

Having a hard time understanding this question (see attachment).