Isaac is trying to solve the problem below. the length of a rectangle is 7 inches greater than the width. the perimeter is 70 inches. what is the width of the rectangle? isaac solved an equation, and the solution was w = 14. he then made sure that a rectangle with width 14 inches and length 21 inches had a perimeter of 70 inches. which problem-solving step was this?

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?