Find the sum of the parts of a given pizza​

How do i put 3(x+7) in distributive property

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

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.