Does 8/18 terminates or repeats

How do you use the elimination method for this question? explain, because i really want to understand!

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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