Can someone help me please:( please please !!!

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Aflagpole broke in a storm. it was originally 8 1 81 feet tall. 2 8 28 feet are still sticking straight out of the ground, where it snapped, but the remaining piece has hinged over and touches the ground some distance away. how far away is the end of the pole from the base of the pole along the ground?

Marking brainliest rewrite the equation x = 65 - 60p by factoring the side that contains the variable p.