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22 February, 23:52

The number of pounds of dog food that a pet store has is represented by the equation y = - 15x + 430, where x represents the number of days that the store is open and y represents the pounds of dog food in stock in the store. How many pounds of dog food will the pet store have after 21 days?

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  1. 23 February, 01:15
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    Y = - - (15 times 21) + 430 = 115

    Pretty simple. Just plug in x=21 and solve.
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