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24 February, 17:05

Nico ordered a side of rice and beans for $2.50 and x tacos, each priced at $3.50, including tax. To determine the total cost of his order, y, Nico set up the equation y = 2.5 + 3.5x. What is the domain of this function

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  1. 24 February, 17:08
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    The domain of a function is the set of values that can be used for x.

    Here, x represents the number of tacos.

    He can order no taco, so x = 0.

    He can order 1 taco, where x = 1.

    He can order 2 tacos, so x = 2.

    He cannot order a fraction of a taco, so x cannot be a mixed numeral.

    He can order as many tacos as he wants, so x can be any whole number, 0 to infinity.

    The domain is all whole numbers.
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