Which type system allows energy to enter or leave the system, but does not allow matter to cross into or out of the system?

Social computing forces companies to deal with customers as opposed to

Mai and chuck have been divorced since 2012. they have three boys, ages 6, 8, and 10. all of the boys live with mai and she receives child support from chuck. mai and chuck both work and the boys need child care before and after school. te boys attend the fun house day care center and mai paid them $2,000 and chuck paid them $3,000. mai's agi is $18,000 and chuck's is $29,000. mai will claim two of the boys as dependents. she signed form 8332 which allows chuck to claim one of the boys. who can take the child and dependent care credit?

The following are the current month's balances for abc financial services, inc. before preparing the trial balance. accounts payable $ 10,000 revenue 6,000 cash 3,000 expenses 17,500 furniture 10,000 accounts receivable 14,000 common stock ? notes payable 6,500 what amount should be shown for common stock on the trial balance? a. $48.000b. $12.500c. $27.000d. $28.000