Which graph shows a system of equations with a solution at (2, -1)?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Answer for 10 points show work you guys in advanced < 3

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18