I need help to do these four problems.

Find for the circle x2 + y = 25 and evaluate Find the slope of the tangent line to the graph of 2 xy? + xy = y when y =1. at the point (3, -4). # Ans: 1 Ans: Find the slope of the tangent line to For the circle centered at the origin with radius 4 and cos(xx) = x y at the point (-1, 1). equation x2 + y2 =16, find " at the first quadrant point where x = 2 if = -3 at that instant