f(-3)=17
f(0)=8
f(9)=18
Step-by-step explanation
Evaluating a function means finding the value of f(x) that corresponds to a given value of x, so we need to input the given value and operate
Step 1
given
a) f(-3)
this is when x=-3, so replace and calculate
hence
f(-3)=17
Step 2
f(0)
so, let x= 0 ,replace and calculate
so
f(0)=8
Step 3
f(9)
finally, for x=9
so
so
f(9)=18