The definition of a circle uses the undefined term
arc
line
plane
ray

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).

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?