Astrip of wood 78 inches long is to be cut into pieces 3 3/4 inches long. how many pieces can be cut?

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Icould really use some with this question.

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)