You are studying for you final exam of the semester. Up to this point, you received 3 exam scores of 75%, 97%, and 60%. To receive a grade of B in the class, you must have an average exam score between 80 and 89 for all 4 exams including final. Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the class. use interval notation.
+36915 (75 + 97 + 60 + x) / 4 = 80
and
(75 + 97 + 60 + x) /4 = 89 Solve for'x' in both equations to find the range of scores....
