The distance in feet that Karina swims in a race is represented by 3d - 3, where d is the distance for each lap. What is an expression equivalent to 3d - 3?
Choose the correct answer below.
OA. 3d - 3 = 3-3d
OB. 3d - 3 = -3 + 3d
OC. 3d - 3 = -3(d+ 3)
OD. 3d - 3 = 3(d-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