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17 October, 00:52

How many solutions are there to the system of equations? {-4x - 5y = 5 - 0.08x + 0.10y = 0.10} A) no solutions B) one solution C) two solutions D) an infinite number of solutions

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  1. 17 October, 01:13
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    The equations are not linearly independent, i. e. one equation cannot be transformed into the other by a simple numerical factor, so the system has exactly one solution.

    Note:

    equations are

    -4x-5y=5 ... (1)

    -0.08x+0.10y=0.10 ... (2)

    If we attempt to multiply (2) by 50 to match the first coefficient:

    50 (2) = >

    50 (-0.08x+0.10y=0.10) = >

    -4x+5y=5 ... (2a)

    Since (2a) is not identical to (1), so we cannot transform (2) to (1) or vice versa by a simple numerical factor, hence the two equations are independent.
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