Can any one help my brother ?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

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?

Can someone, me with this.i really need with this