Help quick pls The product of three different positive integers is equal to 7^3. What is the sum of the three integers?'

it must be 21

Step-by-step explanation:

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the linear relationship that represents a variation in direct proportion is the linear function that varies according to the numbers of its domain, for example the cost of producing x number of items can be represented in direct proportion by f (x) = mx + b, where m is the constant of proportionality, x the number of articles produced and b the fixed cost