4.4(a - 9) - a(a + 4) - 5

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

What is the slope of the line that contains the points (-2,1) and (0,-3)

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”?