Answer:The expression can be simplified in following steps;
Step-by-step explanation:
(16+a)+15=0
16+15+a=0
31+a=0
a=-31
Start by plugging in all your answer choices and see which ones make the solution true
Step-by-step explanation:
f(g(x))=(3x+1)^2 +2(3x+1) -4
=9x^2 +6x +1 +6x +2 -4
=9x^2 +12x +(-1)
I got (X = - 49/2). After checking I know this the correct answer. Hope this got to you in time!