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12 November, 07:32

5 1/2xy^2-2 2/5xy^2-1 3/5 xy^2 - 1/2xy^2 if x=3.9 and y=4 what is the simplified expression and the value

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  1. 12 November, 09:51
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    xy² 62.4

    Step-by-step explanation:

    Collecting terms, you get ...

    ... = xy² (5 1/2 - 2 2/5 - 1 3/5 - 1/2) = xy² ((5 1/2 - 1/2) - (2 2/5 + 1 3/5))

    ... = xy² (5 - 4) = xy²

    Substituting the give values for the variables and doing the arithmetic, you get ...

    ... xy² = 3.9*4² = 3.9*16 = 62.4
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