Acircle is centered at (2, -5) and has radius 3. write its equation in standard form.
a) (x + 2)2 + (y - 5)2 = 3
b) (x - 2)2 + (y + 5)2 = 3
c) (x + 2)2 + (y - 5)2 = 9
d) (x - 2)2 + (y + 5)2 = 9

What is the missing constant term in the perfect square that starts with x^2 -20x

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).

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?