URGENT!! Really need help on this test

Which is the completely factored from of xy^3-x^3y

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte