First you have to simply distribute the + through the parentheses
16+f+4
Then you combine like terms (in this case the 16 and the 4)
f+20
16+(f+4) simplified is f+20
Hope this helps!!
Answer:
16x
Step-by-step explanation:

Subtract the numbers: 9 - 5 = 4

Multiply the numbers: 
=16x
Answer: 2.88/1
Step-by-step explanation: