Mr. walker invested $65,100 in two banks, one paying 4.5% and the other 6%. if he gets $231 more on the 6% investment than that on the 4.5% investment, find the total annual income from the banks. urgent pls < 3

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