HELP HE;LP 4 HRLP help

Can someone me with this problem . show your work .

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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