Answer:
Using distributive property you jsut multiply the number outside the parenthesis by each number inside. 
In this case its 
1/2 ( p + 4) 
So multiply each number (or variable) by 1/2 
And leave the sign if nothing changes
1/2 * p = 1/2p 
1/2 * 4 = 2
You’d get 
1/2p + 2