Simplify: (3d^2 - 3d/ 3d -6) - (6/3d - 6)

What is the value of f(x) = 2.2 for f(-2)?

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

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”?