Mathematics, 04.08.2019 16:00, teresaparraz34

The amount of sales tax on a purchase varies directly as the price of the item varies. if a computer costs $400 before tax and the tax is $30 tax, which of the following equations is a correct step in solving for how much tax is needed for a computer that costs $500?

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The amount of sales tax on a purchase varies directly as the price of the item varies. if a computer...