Find constants A and B such that the function y = Asinx + Bcosx satisfies the differential equation: 2y'' + y' –y = cosx

How do you find the area of this triangle.

Of four points are collinear, they are also coplanar

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.