Pre algebra
posted by Sam on .
What kind of equation would I need for the total weekly cost if a cart rents for $92 and to buy dry ice every day for $2.50 a pound and you need 10 pounds a week. And you are supplied with bars for $0.55 each and you have to sell them for $2.75 per bar. How would I make this as an equation for weekly costs and explain how the coefficients relate to the situation. I THink I have it but Im not sure

we don't know how many bars are bought, let's call that number n
since you want only the "cost"
Cost = 92 + 10(2.5) + .55n
profit = 2.75n  cost