Write 7.5 as a mixed number in simplest form

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

If angle ase measures 168 degrees, find the measure of angle dse. the figure mag not be drawn to scale

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)