What is the solution to the inequality lx+6l-12<13

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Through non-collinear points there is exactly one plane.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).