Need help pls fast

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false