Translating verbal sentences: the difference of twice a number and 3 equals -4
the product of 1/2 and a number is 36
-3 is equal to twice the sum of a number and 2

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).

Asphere has a diameter of 10 in. what is the volume of the sphere?

Are the corresponding angles congruent? explain why or why not.