I need help please ​

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

3.4a=57.8 what is the the value of a