What is the equation of the line that is perpendicular to the line y = − x / 5 + 4 / 5 and passes through the point ( − 3, 4 )? pls answer quickly.

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”?

How do you do the foil method with polynomials?

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?