By definition an expression does not contain

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

The sum of two numbers is 12 and their difference is 18 what are the two numbers