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The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

The function p(x) = –2(x – 9)2 + 100 is used to determine the profit on t-shirts sold for x dollars. what would the profit from sales be if the price of the t-shirts were $15 apiece?

What is the difference between –12 and –5? what is the distance between –12 and –7 on a number line? units