Is anyone good at finding slopes of things?

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

In the diagram of circle o, what is the measure of zabc?

Which of the following shows the length of the third side, in inches, of the triangle below