I really need help on question 19, 21, and 23 please help

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

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

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices