Question

A teacher knows that 80% of her students will score no more than 5 points above or below the class average, 85%, on the test. Which inequality represents the test scores of 80% of her students?

Answer 1

`|x-85| \leq 5`

Explanation:

|x-85| represents the 'distance' of the test score than 85, and this distance must be less than or equal to 5.