Average or Arithmetic mean

Average, (Arithmetic Mean)   Definition:  The sum of all numbers in a group divided by the count of numbers in that group.   Example: Mark took 3 exams during the semester getting the scores 76, 84, and 92. The final grade is based on the average of his test scores. What is Mark's final grade? average = 84 Mark's final grade would be an 84.

Inequality/equality signs

The following are inequality/equality signs you should be familiar with: < less than x < y x is less than y > greater than x > y x is greater than y ≤ less than or equal to x ≤y x is less than or equal to y ≥ greater than or equal to x ≥y x is greater than or equal to y