You and your friend are standing back to back. your friend runs 16 feet forward and then 12 feet right. at the same time, you run 12 feet forward and then 9 feet right. you stop and throw a baseball to your friend who catches it. how far did you throw the baseball?

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.