posted by plz help .
Let cost = 600.00 fixed costs
x = set of tiles $11.00
find the profit equation by substituting your equations for R and C P = R -C THE profit made for 26 and 31 tiles per month.
use trail and error to find the quanity of tile sets per month yields the highest profit.
the fundraiser will cost $1.50 per pencil plus $50.00 in advertising. write an equation that represents the cost, c, for n pencils