What quadrilateral does not belong with a square, reactangle & a parallelogram?

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.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

25 ! i need asap! ! ill mark brainliest!