Combine these radicals 3squareroot2 - 5squareroot2

Solve for x i'll try to attach the files bc it's not letting me for some reason

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.

Which of the following is correct interpretation of the expression -4+13