In your class, you have scores of 84, 95, 83, and 86 on the first four of five tests. to get a grade of upper b, the average of the first five tests scores must be greater than or equal to 80 and less than 90. a. solve an inequality to find the least score you can get on the last test and still earn a upper b. b. what score do you need if the fifth test counts as two tests?

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