Hep me please this is to much

The parabola opens: y=√x-4 (principal square root) up down right left

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Someone answer this asap for the first five terms of a sequence are shown. 5, 11, 23, 47, 95, . . which recursive function defines the nth term in the sequence for n > 1? a. f(n) = f(n - 1) + 6 b) f(n) = f(n - 1) + 48 c) f(n) = 3 • f(n - 1) + 1 d) f(n) = 3 • f(n - 1) - 4