Nathan and steven stacked boxes on a shelf. nathan lifted 13 boxes and steven lifted 15 boxes. the boxes that nathan lifted each weighed 12 lb more than the boxes steven lifted. let s represent the weight of the boxes that steven lifted. which expression represents the total number of pounds nathan lifted? s + 12 12(s+13) 15(s+12) 13(s+12)

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