Mara brought 2/3 yard of yellow ribbon and 1/4 yard of blue ribbon. How many yards of ribbon did she buy all together?

Which graph represents the solution of the inequality?

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).

Is this a polynomial function? i need to know asap