Is this answer proven to be correct dear sir?

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4. Consider the following polynomials: 6 (x2 - 3) and 5x2 + x + 11 a. Find the sum of the polynomials. b. Find the difference of the polynomials.

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A 26-year-old male is interested in purchasing life insurance. Using the table, determine what the annual premium for a 20-Payment Life insurance policy, given that the face value of the policy is $89,657.

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What is the median of this set of data? 100, 102, 103, 106, 109

Already bought 854 acres of land for development if 62 acres of his purchase is reserved for a park how many 3 acres building lots are able for sale