Posted by **Ann** on Monday, September 30, 2013 at 10:45pm.

A local photocopying store advertises as follows. " We charge 14 cents per copy for 150 copies or less, 6 cents per copy for each copy over 150 but less than 230, and 3 cents per copy for each copy 230 and above. " Let x be the number of copies ordered and C(x) be the cost of the job (in cents).

What would the cost be for x ≥ 230?

I really don't know how to do this...I thought the answer would be C(x) = 3x, but it's not. please help

- Pre-Calculus -
**Lala**, Monday, September 30, 2013 at 10:51pm
C(x) = 14 ( 150) + 6 (230-150) + 3x

- Pre-Calculus -
**Ann**, Monday, September 30, 2013 at 11:00pm
I solved that and got C(x) = 2580 + 3x, but apparently it's still not the right answer...

- Pre-Calculus -
**Steve**, Monday, September 30, 2013 at 11:23pm
actually, that's 6(229-150)

- Pre-Calculus -
**Ann**, Monday, September 30, 2013 at 11:27pm
So the answer is C(x)= 2574 + 3x?

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