Of what numbers does the binary system consist of

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.

X+y=-4 x-y=2 use elimination with adding and subtraction

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8