What is the profit if 240 cell phones are sold

Hello!

P(x)=2x²+55x+10-(2x²-15x-40)=70x+50

P(240)=70*240+50=16850.

As as we can clearly see, given that the equation of the revenue is R=2x2+55x+10 and the equation of the cost is C=2x2 – 15x – 40, you will get the profit by subtracting the revenue from the cost: R-C=P. Therefore, P=(2x2+55x+10)-(2x2 – 15x – 40). You will get P=70x+50 where x is is the number of cellphones sold. If 240 cellphones are sold, then the profit is 16850 dollars.

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