For the function f(x)=4x^2-3 find f(x)-f(a)/x-a find f(x+h)-f(x)/h

Which is the correct excel formula for the 80th percentile of a distribution that is n(475, 33)? =norm.dist(80,475,33,1) =norm.inv(0.80,475,33) =norm.s.inv((80-475)/33)?

Two lines that do not intersect are skew. always sometimes or never

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.