The next number is 38. The pattern is 7, 16, 8, 27, 9; if you look at the first 4 numbers, you notice that it counts to 7, 8, 9. Then you have 16 and 27, if the pattern continues; the next number is 38.
F(x) = 3x² + 5x - 8 g(x) = 2x² - 9
5.
f(2) = 3(2²) + 5(2) - 8 g(2) = 2(2²) - 9
f(2) = 3(4) + 10 - 8 g(2) = 2(4) - 9
f(2) = 12 + 10 - 8 g(2) = 8 - 9
f(2) = 14 g(2) = -1
i didn't understand the second part but i hope you understand, God bless!