​Sophie's math teacher plots students grades on their weekly quizzes against the number of hours they say they study on the pair coordinate axes and then draws the line of best fit. based on the line of best fit what score should someone who studies 5 hours expect?​

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