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25 January, 22:37

If f (x) = 5x 40, what is f (x) when x = - 5?

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  1. 25 January, 22:57
    0
    f (x) = 5x*40 so we know that x=5 so f (5) = (5*5) 40 so we have f (5) = 25*40 and 25*40 = 1000 so 1000/5=f and f is 200
  2. 25 January, 22:58
    0
    5 (-5) (40) = f (x) you just multiply everything together, so you would get - 25*40, which is - 1000
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