Find the value of x and the length of each side—- geometry

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

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)