Find the 69th term of the arithmetic sequence -13, -33, -53, ...​

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

Which one is the correct answer, and why?

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x, y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis