What is the reduce form of 10/ab+x

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)?

Solve the system of equations. y= 2x y= x^2 - 15

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?