The dot plot shows the mass, in grams, of several substances in an experiment. how many substances has their mass recorded during the experiment?

Find cot x if sin x cot x csc x = √2

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)