Hello there!
2(8 + h)
The Distributive Property allows us to multiply any number/variable outside of the parenthesis by all numbers/variables inside the parenthesis.
For example;
2(1 + 2)
2(1) + 2(2)
2 + 4
6.
Let's try this with our current problem.
2(8 + h)
2(8) + 2(h)
16 + 2h (This is your simplified expression)
I hope this helps!