Answer:
6
Step-by-step explanation:
h(3)=3+3
y=6
h(9) = 12
[tex]h(x) = x+3[/tex]
Substitute 9 wherever you see x in your equation
[tex]h(9) = (9)+3[/tex]
Add the values to get your final answer
[tex]h(9) = 12[/tex]