86 < (84+88+x)/3 < 90
258 < 84+88+x < 270
86 < x < 98
Your test scores in one class are 84 and 88
What possible scores can you earn on your next test to have a test average between 86 and 90 inclusive?
1 answer
What possible scores can you earn on your next test to have a test average between 86 and 90 inclusive?
1 answer