3. If you have to find g(4), then you should substitute x=4 instead of x into the expression of the function [tex]g(x)=x^2+3. [/tex] So:
[tex]g(4)=4^2+3=16+3=19.[/tex]
Answer 3: correct choice is B.
4. If you have to find x such that h(x)=11,, then you should substitute 11 instead of h(x) into the expression of the function [tex]h(x)=2x+1. [/tex] So:
[tex]11=2x+1,\\ 2x=10,\\x=5.[/tex]
Answer 4: correct choice is A.
