For this answer you will have to use the order of operations, aka PEMDAS.
P-Parenthesis
E-Exponents
M-Multiplication
D-Division
A-Addition
S-Subtraction
This is a very easy question because there aren't any exponents.
We can first look at the Parenthesis because that is what comes first in PEMDAS.
(17+5) All we have to do is 17+5= 22
Then we can do multiplication...
so we have 22 times .5 which equals 11.
Lastly, we will do subtraction because there is no addition....
50-11= 39
Our answer will be 39.