Posted by stacii on Wednesday, November 18, 2009 at 10:24am.
The amount of revenue a company makes per day by selling x items is given by the function f(x) = 14x  0.2x2. How many items should be sold if the company wants to maximize their profit?

math  drwls, Wednesday, November 18, 2009 at 10:41am
I suppose you mean f(x) = 14x  0.2x^2.
Please use an ^ before exponents.
The function has a maximum value where the derivative is zero.
f'(x) = 14  0.4 x = 0
x = 14/.4 = 35
If you don't know differential calculus yet, you can get the same result by "completing the square", but it takes longer, espcially with decimals involved.

math  allen, Saturday, December 5, 2009 at 12:12pm
Determine whether the system is consistent, inconsistent, or dependent.
3x + 2y = 15
6x + 4y = 30

math  Tony, Sunday, March 11, 2012 at 7:49pm
inconsistent
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