The first person who gets it right i will mark u as brainliest
2 answers:
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Answer:
the answer is A,
P(x) = -0.4x³+100x²-900x+500
Step-by-step explanation:
monthly cost:
monthly revenue:
profit function:
i) remove the first bracket
ii) there is a negative sign, '-' in front of the second bracket. so, change the sign of each term of the expression inside the bracket
iii) collect like terms
iv) simply the like terms