SOLUTION: John owns a hotdog stand. He has found that his profit is represented by the equation P(x)= -x^2+62x+79, with P being profits and x the number of hotdogs sold. How many hotdogs mus

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To earn money, his profits have to be positive.

Let's find the point where the profits equal zero.
From that point on, his profit will be positive.



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Check the equation.
John makes a $79 profit selling 0 hot dogs, that can't be right.
Also, when he sells more than a certain number (63), his profits become negative, that doesn't make sense either.
Check and re-post the problem.