<PRE><B>Question 274393</B>
Producing x units of tacos costs C(x)=5x+20; revenue is R(x)=15x, where C(x) and R(x) are in dollars.
a. What is the break-even quantity?
Solve: C(x) = R(x)
5x+20 = 15x
10x = 20
x = 2
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b. What is the profit from 100 units?
Solve: R(100) = 15*100 = 1500
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c. How many units will produce a profit of $500?
Solve: 15x = 500
x = 100/3 = 33 1/3
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Cheers,
Stan H.</PRE>