If four desk lamps cost $120 what is the average cost per lamp?

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

If f(x)= 3x+6 which of the following is the inverse of f(x)

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”?