david makes and sells chairs. The function p(x)=-10x^2+100x-210, graphed below, indicated how much profit he makes in a month if he sells the chairs for 9-x dollars each. what should david charge per chair to make the maximum profit, and what is the maximum profit he can make in a month? (one sec while I post the graph)

Question

anonymous · Answer

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anonymous · Answer

If anyone can work this out for me I would love it. I am very behind in math and am timed to get it done :<

anonymous · Answer

p(x) = -10x^2 + 100x - 210, 
p(9 - x) 
= -10(9 - x)^2 + 100(9 - x) - 210 
= -10x^2 + 80x - 120 
= -10(x - 2)(x - 6) 
x = 2, x = 6 
Answer choice: 
B) $50 at $7 per chair