55fnm2h9pa 55fnm2h9pa 27-08-2021 Mathematics contestada If f(x) = 3x+10x and g(x)=5x-3, find (f+g)(x) A. 3x-5x+3 B. 18x-3 C. 3x+5x+3 D. 3x+15x-3 Need step by step explanation please