Plz help me plz help me​

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

Tan198=asin164=? how to solve this? ?