If a 12 sided regular polygon rotates about its center, at which angle of rotation will the image of the polygon coincide with the preimage?

Which graph shows a function with a range of all real numbers greater than or equal to -1

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Which of the following contains a variable?