Spencer surveyed five of his friends to find out how many pets they have. His results are shown in the table below. What is the mean number of pets? Number of Pets Lara: 3 Cody: 5 Sam: 4 Ella: 1 Maria: 2 The mean number of pets is .

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