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Which math sentence can be used to determine if the triangle is a right triangle?

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

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).