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Question 540943: The math club at Franklin Middle School is selling tutorial books. The club paid $136 for three cases each containing 72 books. The math club sells each book for $8
Use the function P = 8b - 136 where P is the profit in dollars and b is the number of books sold to determine how many books must be sold to make a profit.
Thanks!
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! the function is P = 8b - 136.
P stands for the amount of profit.
b stands for the number of books.
in order to break even, the profit has to be equal to 0 based on this equation.
the equation becoms:
0 = 8b - 136.
add 136 to both sides of this equation to get:
136 = 8b.
divide both sides of this equation by 8 to get:
17 = b.
when b = 17, they break even because 17*8 = 136.
when b < 17, they lose money because profit will be negative.
when b > 17, they make money because profit will be positive.
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