Maria threw a party for the promotion she received the party cost $20 for two people if she invited 20 guest what would be the cost be

The total cost would  be:

$20 = two people- 2*20=40$

20 = guest

20*20=

400 would be the cost

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.