What is X if 2/6 = x/10

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

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)

Which graph of a hyperbola represents the equation 16x^2-y^2=16