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A function is defined by f(x)=5(2-x). What is f(–1)?
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A function is defined by f(x)=5(2-x). What is f(–1)?

User Nitramk
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In the given function f(x) = 5(2-x), subst. -1 for x, obtaining f(-1) = 5(2-[-1])= 10.
User Saen
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