louise loves her rock collection while rock hopping along a stream she finds 10 new rocks for her collection. after she gets home she generously gives her little sister half of her rocks to begin her own collection. How many rocks did she have before her stream rock hopping adventure ……………………………………………….write an equation solve it and write a sentence for the answer. THANK YOU

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Can someone tell me if this is perpendicular? !