An equation is called if its solution set is empty; that is, if it has no solution.

What is the inverse of the function f(x)=2x+1

Which representation has a constant of variation of -2.5

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?