# P(x) = - x ^ 2 + 9x

2022-04-17

P(x) = - x ^ 2 + 9x + 10 Two friends wash cars to make extra money . The profit P ( x ) of one friend after x days can be represented by the function Q(x)=12x The second friend's profit can be determined by the function . Solve the system of equations . What solution is a viable answer to the question , " After how many days will the two students earn the same profit ? and which solution is a nonviable answer ? Show your work and justify your answer .

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