Math problem 16.

Find the value of x, y and z.

Through non-collinear points there is exactly one plane.

Which equation can be simplified to find the inverse of y = 2x2^2

4. jake needs to score in the top 10% in order to earn a physical fitness certificate. the class mean is 78 and the standard deviation is 5.5. what raw score does he need? z value for top 10% =1.282 how do i get the z value? what is the equation for this? raw score =mean+z*sd = 78+1.282*5.5 = 85.051