Answer:
A
Explanation:
using PEMDAS (parenthesis, exponents,multiplication/division, addition/subtraction) you solve in parenthesis first, which would be 11+5= 16 and then addition, 20+16=36. an easy way to remember PEMDAS would be:
Please
Excuse
My
Dear
Aunt
Sally
hope this helps, i have been in this situation before :)