What is an equation that represents a non proportional relationship??? I really need help(I know nothing about proportional and non proportional equations)

Which of the binomials below is a factor of this trinominal? x^2-13+30

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.