In a survey asking 1200 students what they did on winter vacation, the following results were found: 45% visited family and 270 had family visit them. the remainder of the students didn't see any family members outside of their immediate families. a. how many students visited families? b. your bill at a restaurant comes to $56. you want to leave a 15% tip. how much should you leave?

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.

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.