Six x minus three y equals negative twelve

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”?

Based on the spreadsheet below, which of the following is a true statement?

The tiles on the left contain functions written using function notation . match each function with its input