Use the law of cosines to find each missing side round to the nearest tenth

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

Does anyone know how to do geometryme with this problem

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.