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To receive a C grade, a student must average more than 77 but less than or equal to 85. If Isabella
received a C in the course and had five grades of 78, 79, 74, 64, and 85 before taking the final exam,
what were the possible grades for her final if there were 100 points possible? (Assume all six grades are weighted equally and let x represent the unknown score.

Respuesta :

Answer:

She must have scored greater than 82 and  up to 100 on the final

Step-by-step explanation:

Her average had to be between 77    or  <= 85

for > 77:  

 (78+ 79 + 74 + 64 + 85 + x)/6 > 77

     x > 82

for <= 85:     (78+ 79 + 74 + 64 + 85 + x) / 6 <=85

                          x<=130    ( but she can only score up to 100)

                 

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