Need help TvT lol *anyways hru*

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.