Last question PLZ help ! How can you solve the system? Complete the sentence.

3x + 3y = 9
-6x - 4y = -14

Multiply 3x + 3y = 9 by and add it to -6x - 4y = -14.

What is always true about a positive integer raised to a negative odd power?

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”?

The answer is 7.2 how would you put this as money