When Sergio went to dinner with his brother, the bill was $51.19. What was the total they paid if they left a 15% tip?

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation:

no this is a nonlinear negative

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3