# Thread: Let "x" represent, let "y" represent. write equation for costs and revenue

1. ## Let "x" represent, let "y" represent. write equation for costs and revenue

Hi everyone,

I have a multi part question that I am unsure how to solve. Here it is (sorry it's kind of long):

c) in general: profit = revenue - costs. the profit made (or lost) will depend on the number of cakes. as i showed above, 1 cake has a cost of $466, if it sells, that is$25 revenue, defraying the loss to a mere $441 dollars in the hole. d) if you do (b) & (c), you should be able to use what i said for (c) to get a formula for profit/loss. 3. ## Re: Let "x" represent, let "y" represent. write equation for costs and revenue Originally Posted by butcshe Hi everyone, I have a multi part question that I am unsure how to solve. Here it is (sorry it's kind of long): Lee is starting a cake decorating and baking business. She had to invest$462 in her business to get started. She pays $4 per cake for ingredients, and she sells each cake for$25.

a) Let x represent___number of cakes she makes_
Let y represent___her total costs___________

b) write an equation that represents her costs. y = 462 + 4x

c) write an equation that represents her revenue R = 25x

d) does Lee make a profit or lose money for
15 cakes? 20 cakes? 25 cakes?
you can finish part (d) ...

4. ## Re: Let "x" represent, let "y" represent. write equation for costs and revenue

Hey Deveno and Skeeter,

Thanks so much for your help. Things are much clearer now. Much appreciated.

5. ## Re: Let "x" represent, let "y" represent. write equation for costs and revenue

what Lee needs to know (as any good businesswoman should) is: when is her profit 0? (this is "the break-even point"). how many cakes does this require she sell?