Your test scores in one class are 75 and 83. What possible scores can you earn on your next test to have a test average between 79 and 86, inclusive?

A score between 79 to 100

Step-by-step explanation:

As the average is not a simple number but a range between 79 and 86 you need to make a decision on what average number to choose, for example we can choose the 79 or 86

First we choose 79

Then (test1+test2+test3) / 3=79

(75+83+test3) / 3=79

75+83+test3=237

Test3=237-75-83

Test3=79

Second we choose 86

(test1+test2+test3) / 3=86

(75+83+test3) / 3=86

75+83+test3=258

Test3=258-75-83

Test3=100

According to this you need a score in the range from 79 to 100 to have a test average between 79 to 86