Answer:
-2
Step-by-step explanation:
This is the topic of functions.
If it says h(x), then that means that the x in the rest of the function is the variable.
The question is asking for h(3), therefore you replace the x in the function with 3, and work it out:
h(x) = 5x - 17
h(3) = 5(3) - 17
h(3) = 15 - 17
h(3) = -2
Hope this helps!
