Shauna borrows $400 from her parents to buy a phone. she agrees to pay them back plus 4% simple interest over one year. part a write an equation to represent the total amount shauna will owe her parents.

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field