How i do 5÷312 in long form of division

Jim makes $10.35 per hour. write an equation that jim can use to calculate his pay.

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

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).