SOLUTION: Mark is selling buttons for $1.50 at a craft fair. He paid $25 for the booth space and $50 for supplies. a.How many buttons will he need to sell to break-even (zero profit)?

Question 700506: Mark is selling buttons for $1.50 at a craft fair. He paid $25 for the booth space and $50 for supplies.
a.How many buttons will he need to sell to break-even (zero profit)?
b.If he sells 135 buttons, what will his profit be?

For a. I got f(x)= 1.50x+75
and b. 40=x
Found 2 solutions by lynnlo, josmiceli:
Answer by lynnlo(4176) (Show Source): You can put this solution on YOUR website!
(1)sell 50 buttons
(2)profit $127.50
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Profit is ( income ) - ( costs )

Let = number of buttons sold

(a)
When profit = 0

If he sells 50 buttons, he breaks even
(b)

His profit is $127.50

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