If you are grounded, there are two options - you are only grounded or you have extra chores too. Therefore, at that point, there is a 100% chance of you already being grounded - we need to figure what percentage of 100 the extra chores is. To find that, we can do 50/85= around 59% percent
78
x=-3. Plug -3 into x

We will follow PEMDAS for this.
-3²=9. A negative multiplied by a negative always equals a positive.
9×2=18
18-5=13
13×6=78
PEMDAS is Parentheses Exponents Multiplication Division Addition Subtraction. You will hear of it as Please Excuse My Dear Aunt Sally to begin with.