Five whole numbers are written in order. 5 8 x y 12
The mean and median of the five numbers are the same.
Work out the values of x and y

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.