Simplify each of the following expressions.

a) 3x + 5x
b) m + m + m + m
c) 3y-2y+8y
d) 4p-4p
e) 5s-s-2s
f) 3x + 4y + 2x + 5y
g) 4w + 5t - 3w - t
h) 5m + 6 + 2m - n
i) 2x + 7y - y - x
) 9 + 5x - 3 + 7x
k) 7p + 8 - 2p - 5
1) y + 3x - 7 + 2x - y
m) 6 + 70 - 4c + 6
n) 5f + 9 + 2d - 7 - f

Please help

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