If f(x) = 7 + 4x and g(x) = 2x, what is the value of 8 (5)? a)11/2 b)27/10 c)160 d)270

I got D but i’m not 100% sure

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?