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Algebra / Linear functions Difficulty: Easy

The function f is defined by fx=80-6x. What is the value of f7?

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Explanation

Choice B is correct. It’s given that function f is defined by fx=80-6x. The value of f7 can be found by substituting 7 for x in the given function, which yields f7=80-67, or f7=80-42, which is equivalent to f7=38. Therefore, the value of f7 is 38 .

Choice A is incorrect. This is the value of 80-67, not 80-67.

Choice C is incorrect. This is the value of 80-61, not 80-67.

Choice D is incorrect. This is the value of 80-6+7, not 80-67.