When parallel lines are cut by a transversal, which of these statements must be true about the measures of vertical angles?

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

Ineed in figuring out this problem.

Find the value of x. give reasons to justify your solutions! l, m ∈ kn