dx/dy - snn(x + y) = 0 Ecuación separable

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.