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Evaluate the expression when m=-5.7 and n=7.8.5m-7n

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Evaluating Algebraic Expressions

We are given the expression

Q = 5m - 7n

And we're required to evaluate it for m=-5.7 and n=7.8.

Substituting:

Q = 5(-5.7) - 7(7.8)

Operating the products separately:

Q = -28.5 - 54.6

Operating:

Q = -83.1

The expression results -83.1

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