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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.

 Mar 2, 2020
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(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....

 Mar 2, 2020

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