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25-05-2018
Mathematics

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if f(x) = 5x + 40, what is f(x) when x equals -5?

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Respuesta :

25-05-2018

[tex]f(x)=5x+40\\\\x=-5\\\\\text{substitute the value of x to the equation}\\\\f(-5)=5\cdot(-5)+40=-25+40=15[/tex]

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