Number 6 and im nit very good at math

Simplify the expression. -2/5(10+15m-20n)

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

Given abc find the values of x and y. in your final answer, include all of your calculations.