2x + 3y = 2 y = {x+3 what is the solution to the system of equations? 0 (-2,2) (0, 0.67) (0,3) (1,0)

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”?