Find the given limit lim(x, y)→(a, a)x4−y4x2−y2=lim(x, y)→(a, a) (x^4−y^4)/(x2−y2)= here aa is a constant. (find the limit assuming x≠y)

Find the domain and range of the following function f(x) = 51x - 21+ 4

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”?

Solve for x and select the correct answer