Simplify, don’t solve for x, just simplify, write it with only one x and no parenthesis: 2(4x – 1) + 3x =

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”?