Which situation can be modeled by the expression 60+ (-40)+80

Select true or false to tell whether the following conditional p q is true or false. use the truth table if needed. if a week has seven days, then a year has twenty months.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Select all of the following expressions that are equal to 2.5.