Just do 11 or 12 or both please im really tired and it 1:34 in the morning plz help

Afootball is throw by a quarterback to a receiver

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

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