How do I classify this

What is sin 7x/4 ? i need on this urgent trig

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have