The formula p = nc - e gives the profit p when a number of items n are each sold at a cost c and expenses e are subtracted. If p = 3750, n = 3000 and e = 900, what is the value of c?
p = nc - e Plug in 3,750 for p, 3,000 for n, and 900 for e. 3,750 = 3,000c - 900 Add 900 to both sides. 4,650 = 3,000c Divide both sides by 3,000. c = 1.55
