(Help me please) Read all of it pls? John made 3 different stacks of wooden blocks. The first stack was 6 blocks high, the second stack was 7 block(s) higher than the first, and the final stack was 6 blocks higher than the second. how many blocks did John use for all 3 stacks?

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