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15 February, 19:24

Use the cubic model y = 5a3 - 2a2 + a - 45 to find the value of y when x = 4.

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  1. 15 February, 19:28
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    Assuming 5a3 equals 5a^3, and the same for everything else, you would plug in 4 for a, so 5 (4) ^3 - 2 (4) ^2 + 4 - 45, which equals 247.
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