Let f(x) = 3x" -7 and let g(x) = 4x + 1. Find the given value. f[g(2)] flg(2)]= (Type an integer or a decimal.)Find fig(x)] and g[f(x)]. x) = 6x- - g(x)Find fig(x)] and g[f(x)]. x+ 1, g(x) = 8x - 13\f2 - P Suppose the demand for a certain brand of a product is given by D(p) = - 400 + 500, where p is the price in dollars. If the price, in terms of the cost c, is expressed as p(c) = 4c- 8, find the demand function in terms of the cost D(c) =