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## #1 2006-01-21 16:13:42

ineedhelp
Member
Registered: 2006-01-21
Posts: 7

### Homework help. I don't even know where to start.

Fantastic Flags, Inc., finds that the cost to make x flags is: C = 19x + 10, 135
while the revenue produced from them is R = 37x (C and R are in dollars).

What is the smallest whole number of flags, x, that must be sold for the company to show a profit (that is, the point at which revenue begins to exceed cost)?

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## #2 2006-01-21 16:18:48

irspow
Member
Registered: 2005-11-24
Posts: 457

### Re: Homework help. I don't even know where to start.

R - C = P  (Profit)

So you want to know when;

R-C>0

37x - 19x - 10135 > 0

18x - 10135 > 0

18x > 10135

x > 563.05555...

x = 564

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## #3 2006-01-21 17:09:04

MathsIsFun
Registered: 2005-01-21
Posts: 7,685

### Re: Homework help. I don't even know where to start.

... and if they sell 564 this is the result:

Cost =  19x + 10,135 = 19 × 564 + 10,135 = 20,851
Revenue = 37x = 37 × 564 = 20,868

Profit = 20,868 - 20,851 = \$17

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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## #4 2006-01-21 21:45:32

ineedhelp
Member
Registered: 2006-01-21
Posts: 7

### Re: Homework help. I don't even know where to start.

Dang.  Looks so easy now.  Hard to see why I didn't see it myself.  Thanks for the help.

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