Find the value of a1 for an infinite geometric series with s=-45 and r=-1/ get -5 but its saying its wrong. idk how

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.

The number of students who ride a school bus is 110% of the number of students who walk. how many students ride the school bus?

The ordered pair (2,-5.2) is located in quadrant iv