Answer:
there's about 21 students in the class room
Step-by-step explanation:
Together you know that there are thirds. So if 2 of the thirds are 16 then to find the last third you have to divide 16 by 3 to find the last third. WHEN you finish dividing you add your quotient to 16 and you get 21
(f+g)(x) = f(x) + g(x)
= x/2-3 + 4x²+x+4
= ..........