What’s half of 2 1/2 as a fraction?

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).

Which of the following is the correct ratio for converting kilograms to grams

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15