How do I solve 6a and 6b

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?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122