Evaluate the expression below for x = 4 and y = 3. X2 + 3(x + y)
When x = 4 and y = 3, x² + 3(x + y) = (Type an integer or a decimal.)

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”?