Whitch expression are eguivalent to 4(4a+5)

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Asequence has a common ratio of and f(5) = 81. which explicit formula represents the sequence? f(x) = 24 f(x) = 16 f(x) = 24 f(x) = 16

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)