2|2x-a|<|x+3a|
Set of values of x for which a is a positive constant

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Write a function for a rotation 90 degrees counter clockwise about the origin, point 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”?