Answer:
35
Explanation:
First you will simplify the expression inside of the parentheses
-30 + (-15) becomes -30 - 15
Next you will combine the like terms by adding their values
-30 - 15 = -45
You now have -45 + 80
Now, you need to combine -45 and 80 by adding their values
-45 + 80 = 35
So the answer is 35